WO2004044213A1

WO2004044213A1 - Novel polyhydroxy alkanoate copolymer including within molecule unit having vinyl group or carboxyl group in side chain, and producing method therefor

Info

Publication number: WO2004044213A1
Application number: PCT/JP2003/013531
Authority: WO
Inventors: Takashi Kenmoku; Tetsuya Yano; Chieko Mihara; Shinya Kozaki; Tsutomu Honma; Tatsuki Fukui; Takeshi Imamura
Original assignee: Canon Kabushiki Kaisha; Sugawa, Etsuko
Priority date: 2002-10-24
Filing date: 2003-10-23
Publication date: 2004-05-27
Also published as: JP4502363B2; US7425432B2; US20060211100A1; JP2004162044A; AU2003274742A8; AU2003274742A1

Abstract

The invention provides a PHA copolymer including at least a 3-hydroxy-ω-carboxyalkanoic acid represented by a formula (19) or (32) and simultaneously at least a unit represented by a formula (2) or a formula (3) in a molecule, a precursor PHA copolymer having a corresponding vinyl group or a corresponding alkoxycarbonyl group, a biosynthesis method thereof by microorganisms, and a method of producing a desired PHA copolymer from the precursor PHA copolymer: (wherein k, m, n are integers; R18 represents H, Na, K, R27 represents (A); R1 represents a substituent on a cyclohexyl group and represents H, CN, NO2, a halogen atom, CH3, C2H5, C3H7, CF3, C2F5, or C3F7; R includes a residue including a phenyl structure or a thienyl structure; these being independent for each unit).

Description

DESCRIPTION

NOVEL POLYHYDROXY ALKANOATE COPOLYMER INCLUDING WITHIN MOLECULE UNIT HAVING VINYL GROUP OR CARBOXYL GROUP IN SIDE CHAIN, AND PRODUCING METHOD THEREFOR

TECHNICAL FIELD

The present invention relates to a polyhydroxy alkanoate (hereinafter also abbreviated as PHA) copolymer including a novel unit having a double bond and a producing method therefor utilizing microorganisms, also polyhydroxy alkanoate copolymer including a novel unit having a carboxyl group or a salt thereof, derived from the aforementioned copolymer, and a producing method therefor.

Also the present invention relates to a polyhydroxy alkanoate copolymer including a novel unit having an ester group and a producing method therefor utilizing microorganisms, also polyhydroxy alkanoate copolymer including a novel unit having^' a carboxyl group or a salt thereof, derived from the aforementioned copolymer, and a producing method therefor.

BACKGROUND ART

It has already been reported that various microorganisms produce poly-3-hydroxybutyric acid (PHB)or other poly-3-hydroxyalkanoate (PHA) and accumulate such products therein. Such PHA produced by the microorganisms can be utilized for producing various products . Also the PHA produced by microorganisms, being biodegradable, has the advantage that it can be completely decomposed by the microorganisms . Therefore the PHA produced by microorganisms, when discarded, unlike the various conventional synthesized polymers, would not cause pollution resulting from remaining in the natural environment. Also the PHA produced by microorganisms shows satisfactory affinity to the living tissues and is expected in the applications as the soft material for medical use. However, for wider application of microorganism-produced PHA, for example for application as functional polymer, PHA having a substituent other than alkyl group in the side chain, namely "unusual PHA", is anticipated to be extremely useful. Examples of hopeful substituents for this purpose include a group containing an aromatic ring (phenyl group, phenoxy group etc.), an unsaturated hydrocarbon group, an ester group, an allyl group, a cyano group, a halogenated hydrocarbon group and an epoxide present on the side chain. Among these, PHA having an aromatic ring is actively investigated as follows : (a) PHA containing a phenyl group or a partially substituted group thereof:

Makromol. Chem. 191, 1957-1965(1990) and Macromolecules, 24, 5256-5260(1991) report that Pseudomonas oleovorans produces PHA containing 3- hydroxy-5-phenylvaleric acid as a unit, from 5- phenyl aleric acid as a substrate.

Macromolecules, 29, 1762-1766(1996) reports that Pseudomonas oleovorans produces PHA containing 3-hydroxy-5- (p-tolyl) valeric acid as a unit, from 5- (p-tolyl) valeric acid as a substrate.

Macromolecules, 32, 2889-2895(1999) reports that Pseudomonas oleovorans produces PHA containing 3-hydroxy-5- (2, 4-dinitrophenyl) aleric acid and 3- hydroxy-5- (p-nitrophenyl) valeric acid as units, from 5- (2, 4-dinitrophenyl) valeric acid as a substrate.

(b) PHA containing phenoxy group or a partially substituted group thereof:

Macromol. Chem. Phys., 195, 1665-1672(1994) reports that Pseudomonas oleovorans produces a PHA copolymer containing 3-hydroxy-5-hydroxyvaleric acid and 3-hydroxy-9-phenoxynonanoic acid as the units, from 11-phenoxyundecanoic acid as a substrate.

Also Japanese Patent No. 2989175 discloses inventions relating to a homopolymer constituted of a 3-hydroxy-5- (monofluorophenoxy) pentanoate (3H5(MFP)P) unit or a 3-hydroxy-5- (difluorophenoxy) pentanoate (3H5(DFP)P) unit, a copolymer containing either a 3H5(MFP)P unit or a 3H5(DFP)P unit or both, a novel strain of Pseudomonas putida capable of producing these polymers, and a method for producing the aforementioned polymers utilizing bacteria of genus Pseudomonas . This patent specification teaches, as the effects of such inventions, that PHA polymer having a phenoxy group substituted with 1 or 2 fluorine atoms at the end of the side chain can be biosynthesized from a long-chain fatty acid having a fluorine substituent and that thus produced PHA has a high melting point and is capable of providing stereoregularity and water repellency while maintaining satisfactory working properties. In addition to the fluorine-substituted PHA having a fluorine substitution on the aromatic ring in the unit, there are also investigated PHA having a cyano group or a nitro group on the aromatic ring in the unit. Can. J. Microbiol., 41, 32-43(1995) and Polymer International, 39, 205-213(1996) report production of PHA, containing 3-hydroxy-6- (p-cyanophenoxy) hexanoic acid or 3-hydroxy-6- (p-nitrophenoxy) hexanoic acid as the monomer unit, by Pseudomonas oleovorans ATCC 29347 strain and Pseudomonas putida KT2442 strain, from octanoic acid and 6- (p-cyanophenoxy) hexanoic acid or 6- (p-nitrophenoxy) hexanoic acid as a substrate.

These references relate to PHA having an aromatic ring on the side chain, instead of alkyl groups of the usual PHA, which are effective in obtaining polymer with physical properties resulting from such aromatic ring.

Also as a new category not limited to changes in the physical properties, investigations are also made for producing PHA having an appropriate functional group on the side chain, thereby obtaining PHA with new functions utilizing such substituent.

As a specific method for such purpose, investigations are also made for producing PHA having, in a unit thereof, reactive group such as a bromo group or a vinyl group with a high activity for example in an addition reaction to introduce an arbitrary function group in a side chain of the polymer by a chemical conversion utilizing such active group, in order to obtain PHA of multiple functions.

Macromol. Rapid Commun., 20, 91-94(1999) reports production of PHA having a bromo group in a side chain by Pseudomonas oleovorans, and modifying the side chain with a thiolated product of acetylated maltose thereby synthesizing PHA different in solubility and hydrophilicity.

Polymer, 41, 1703-1709(2000) reports producing PHA, having 3-hydroxyalkenic acid with an unsaturated bond (vinyl group) at an end of a side chain as a monomer unit, by Pseudomonas oleovorans with 10- undecenoic acid as a substrate, followed by an oxidation reaction with potassium permanganate to synthesize 3-hydroxyalkanoic acid having a diol at the end of the side chain, which PHA is reported to show _^such a change in solubility in solvents, as becoming soluble in polar solvents such as methanol, an acetone-water (80/20, v/v) or dimethylsulfoxide and insoluble in non-polar solvents such as chloroform, tetrahydrofuran or acetone.

Also Macromolecules, 31, 1480-1486(1996) reports production of a polyester, including a unit having vinyl group in a side chain by Pseudomonas oleovorans and epoxylating the vinyl group to obtain a polyester having an epoxy group in the side chain.

Also Polymer, 35, 2090-2097(1994) reports a crosslinking reaction within the polyester molecule utilizing the vinyl group in the side chain of polyester, thereby improving physical properties of polyester.

Macromolecular chemistry, 4, 289-293(2001) reports producing PHA, including 3-hydroxy-10- undecenoic acid as a monomer unit, from 10-undecenoic acid as a subsrate, and then executing an oxidation reaction with potassium permanganate to obtain PHA including 3-hydroxy-10-carboxydecanoic acid as a monomer unit, and reports an improvement in a decomposition thereof.

Furthermore, in order to modify physical properties of PHA having an active group in a unit and to actually utilize it as a polymer, it has been studied biosynthesis of a PHA copolymer including a unit having the active group and other units; Macromolecules, 25, 1852-1857(1992) reports production of a PHA copolymer including a 3-hydroxy- ω-bromoalkanoic acid unit and a linear alkanoic acid unit by Pseudomonas oleovorans in the presence of an ω-bromoalkanoic acid such as 11-bromoundecanoic acid, 8-bromooctanoic acid or 6-bromohexanoic acid and n- nonanoic acid.

Such PHA having a highly reactive active group such as a bromo group or a vinyl group can be subjected to introduction of various functional groups or chemical modification, and such a group can be a crosslinking point for a polymer, so that it is very useful means for realizing multiple functions in PHA.

Also technologies related to the present invention include a technology of oxidizing a carbon- carbon double bond with an oxidant to obtain a carboxylic acid (Japanese Patent Application Laid- Open No. S59-190945, J. Chem. Soc, Perkin. Trans. 1, 806(1973), Org. Synth., 4, 698(1963), J. Org. Chem., 46, 19(1981), and J. Am. Chem. Soc, 81, 4273(1959).

On the other hand, active investigations are being made for obtaining a multi-functional PHA from PHA including an ester group in a unit.

Macromol. Chem. Phys., 195, 1405-1421(1994) reports production of a polyhydroxy alkanoate including a unit having an ester group in a side chain, employing Pseudomonas oleovorans as a production microorganism and an alkanoate ester. Also University of Massachusetts Ph. D. Dissertation Order Number 9132875 (1991) reports production of a polyhydroxy alkanoate including a unit having a benzylester structure, also employing Pseudomonas oleovorans as a production microorganism. However, the copolymers in the foregoing reports are comprised of a monomer unit having a carboxyl group or an ester group at the end of a side chain and a monomer unit having a linear alkyl group (usual PHA) having a low glass transition temperature. On the other hand, there is no report on copolymers including unusual PHA having on the side chain thereof a substituent other than a linear alkyl group, such as a phenyl structure, a thienyl structure or a cyclohexyl structure. Thus such polyhydroxy alkanoate and a producing method therefor have been required. Also PHA having a vinyl group as an active group is a PHA copolymer with a monomer unit having a linear alkyl group (usual PHA), its low glass transition temperature and low melting point are undesirable properties in the working and the use of the polymer.

Because of the above-described situation, there have been a demand for PHA having an active group and a production method therefor, such that PHA can be produced by a microorganism at a high yield, the unit ratio of the active group can be controlled, and its physical properties can be freely regulated not to limit its application as a polymer.

DISCLOSURE OF THE INVENTION

As a result of intensive investigations, the present inventors have found a method of synthesizing a PHA formed by copolymerization of a unit having a vinyl group, an ester group or a carboxyl group of a high reactivity, and a unit having either one of a phenyl structure, a thienyl structure and a cyclohexyl structure which can contribute to an improvement of physical properties of the polymer, and have thus made the present invention. The present invention is outlined in the following. [1] A polyhydroxy alkanoate copolymer including at least a 3-hydroxy-ω-alkenoic acid unit represented by a chemical formula (1) in a molecule, and simultaneously at least a 3-hydroxy-co-alkanoic acid unit represented by a chemical formula (2) or a 3- hydroxy-ω-cyclohexylalkanoic acid unit represented by a chemical formula (3) in the molecule: [Chemical Formula (1)]

in which n represents an integer selected within a range indicated in the chemical formula; and in case plural units are present, n is the same or different for each unit; [Chemical Formula (2) ]

in which m represents an integer selected within a range indicated in the chemical formula; R represents a residue having any of a phenyl structure or a thienyl structure; and in case plural units are present, and R are the same or different for each unit;

[Chemical Formula (3) ]

in which Rx being a substituent on a cyclohexyl group represents a hydrogen atom, a CN group, a N0₂ group, a halogen atom, a CH₃ group, a C₂Hs group, a C₃H₇ group, a CF₃ group, a C₂Fs group, or a C₃F₇ group; k represents an integer selected within a range indicated in the chemical formula; and in case plural units are present, Ri and k may be the same or different for each unit.

[2] A polyhydroxy alkanoate copolymer including at least a 3-hydroxy-ω-carboxyalkanoic acid unit represented by a chemical formula (19) or 3-hydroxy- ω-alkoxycarbonylalkanoic acid unit represented by a chemical formula (32) in a molecule, and simultaneously at least a 3-hydroxy-ω-alkanoic acid unit represented by the chemical formula (2) or a 3- hydroxy-ω-cyclohexylalkanoic acid unit represented by the chemical formula (3) in the molecule, [Chemical Formula (19)]

n =1-8 (19) in which n represents an integer selected within a range indicated in the chemical formula; Ris represents an H atom, a Na atom or a K atom: and in case plural units are present, n and Rι₈ may be the same or different for each unit; and [Chemical Formula (32)]

n =1-8 (32)

in which n represents an integer selected within a range indicated in the chemical formula; R₂ represents any of residues indicated in the chemical formula; and in case plural units are present, n and R₂₇ may be the same or different for each unit.

[3] A method for producing a polyhydroxy alkanoate copolymer including at least a 3-hydroxy-ω-alkenoic acid unit represented by the chemical formula (1) in a molecule, and simultaneously at least a 3-hydroxy- co-alkanoic acid unit represented by a chemical formula (2) or a 3-hydroxy-ω-cyclohexylalkanoic acid unit represented by a chemical formula (3) in the molecule, characterized in including a biosynthesis by a production microorganism from at least an ω- alkenoic acid represented by a chemical formula (24) and at least a compound represented by a chemical formula (25) or at least an ω-cyclohexylalkanoic acid represented by a chemical formula (26) as starting materials : [Chemical Formula (24)]

0

H₂C=HC (CH₂)_P CH₂ CH₂ C II OH

P = ^1"8 (24) in which p represents an integer selected within a range indicated in the chemical formula; [Chemical Formula (25) ] R₂₃—(CH₂)q-CH—CH₂—C-OH q = 1-8 (25)

in which q represents an integer selected within a range indicated in the chemical formula; and R₂₃ includes a residue having a phenyl structure or a thienyl structure;

[Chemical Formula (26)]

in which R₂₄ represents a substituent on a cyclohexyl group and represents an H atom, a CN group, a N0₂ group, a halogen atom, a CH₃ group, a C₂H₅ group, a

C₃H group, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and r represents an integer selected within a range indicated in the chemical formula. [4] A method for producing a polyhydroxy alkanoate copolymer including at least a 3-hydroxy-ω- carboxyalkanoic acid unit represented by the chemical formula (19) in a molecule, and simultaneously at least a 3-hydroxy-ω-alkanoic acid unit represented by the chemical, formula (2)' or a 3-hydroxy-ω- cyclohexylalkanoic acid unit represented by the chemical formula (3) in the molecule comprising the steps of : preparing a polyhydroxy alkanoate copolymer including at least a 3-hydroxy-ω-alkenoic acid unit represented by the chemical formula (1) in a molecule, and simultaneously at least a 3-hydroxy-ω-alkanoic acid unit represented by the chemical formula (2) or a 3-hydroxy-ω-cyclohexylalkanoic acid unit represented by the chemical formula (3) in the molecule as a starting material, and oxidizing a double bond portion in the polyhydroxy alkanoate represented in the chemical formula (1) to generate the object polyhydroxy alkanoate copolymer. [5] A method for producing a polyhydroxy alkanoate copolymer, characterized in employing a polyhydroxy alkanoate copolymer including at least a 3-hydroxy-ω- alkoxycarbonylalkanoic acid unit represented by a chemical formula (32) in a molecule, and simultaneously at least a 3-hydroxy-ω-alkanoic acid unit represented by the chemical formula (2) or a 3- hydroxy-ω-cyclohexylalkanoic acid unit represented by the chemical formula (3) in the molecule as a starting material, and executing a hydrolysis in the presence of an acid or an alkali or executing a hydrogenolysis including a catalytic reduction, thereby generating a polyhydroxy alkanoate copolymer including at least a 3-hydroxy-ω-carboxyalkanoic acid unit represented by the chemical formula (19) in a molecule, and simultaneously at least a 3-hydroxy-ω- alkanoic acid unit represented by the chemical formula (2) or a 3-hydroxy-ω-cyclohexylalkanoic acid unit represented by the chemical formula (3) in the molecule.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a ¹H-NMR spectrum of a polyester obtained in Example 1. Fig. 2 is a ¹H-NMR spectrum of a polyester obtained in Example 2.

Fig. 3 is a ¹H-NMR spectrum of a polyhydroxy alkanoate copolymer obtained in Example 11, and including 3-hydroxy-5- (phenylsulfanyl) valeric acid represented by a chemical formula (58) , a 3-hydroxy- 10-undecenoic acid represented by a chemical formula (5) , 3-hydroxy-8-noneic acid represented by a chemical formula (6) and 3-hydroxy-6-heptenic acid represented by a chemical formula (7). Fig. 4 is a ¹H-NMR spectrum of a polyhydroxy alkanoate copolymer obtained in Example 11, and including 3-hydroxy-5- (phenylsulfonyl) valeric acid represented by a chemical formula (59) , a 3-hydroxy- 9-carboxynonanoic acid represented by a chemical formula (54), 3-hydroxy-7-carboxyheptanoic acid represented by a chemical formula (55) and 3-hydroxy- -5-carboxyvaleric acid represented by a chemical formula (56) .

Fig. 5 is a GC-MS TIC spectrum of a methylation decomposite of a polyester obtained in Example 34.

Fig. 6 is a mass spectrum of a peak derived from a unit shown by a chemical formula (80) of a methylation decomposite of the polyester, obtained in Example 34.

Fig. 7 is a mass spectrum of a peak derived from a unit shown by a chemical formula (81) of a methylation decomposite of the polyester obtained in Example 34.

Fig. 8 is a mass spectrum of a peak derived from a unit shown by a chemical formula (82) of a methylation decomposite of the polyester obtained in Example 34.

BEST MODE FOR CARRYING OUT THE INVENTION

A polyhydroxy alkanoate copolymer, the final product of the present invention, is a polyhydroxy alkanoate copolymer (hereinafter also called carboxyl PHA) comprising a unit having a carboxyl group on a side chain as represented by a chemical formula (19) and a unit represented by a chemical formula (2) or a chemical formula (3) :

n = 1-8 (19) in which n represents an integer selected within a range indicated in the chemical formula; R_i8 represents an H atom, a Na atom or a K atom;

in which m represents an integer selected within a range indicated in the chemical formula; R includes a residue having any of a phenyl structure or a thienyl structure; and in case plural units are present, and R may be the same or different for each unit;

in which Ri represents a substituent on a cyclohexyl group and represents a hydrogen atom, a CN group, a N0₂ group, a halogen atom, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; k represents an integer selected within a range indicated in the chemical formula; and in case plural units are present, Ri and k may be the same or different for each unit.

In the present invention, R in the chemical formula (2) represents a residue having a phenyl structure or a thienyl structure selected from the group consisting of chemical formulas (8), (9), (10), (11), (12), (13), (14), (15), (16), (17) and (18): the chemical formula (8) :

represents a group of non-substituted or substituted phenyl groups in which R₂, a substituent on an aromatic ring and represents an H atom, represents a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H5 group, a C₃H₇ group, a CH=CH₂ group, a COOR₃ group (R₃ represents an H atom, a Na atom or a K atom) which is not included when produced by a microorganism, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and in case plural units are present, R₂ is the same or different for each unit; the chemical formula (9) :

represents a group of non-substituted or substituted phenoxy groups in which R represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a SCH₃ group, a CF₃ group, a C₂Fs group, or a C₃F₇ group; and in case plural units are present, R₄ may be the same or different for each unit; the chemical formula (10) :

represents a group of non-substituted or substituted benzoyl groups in which R₅ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H group, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and in case plural units are present, R₅ may be the same or different for each unit; the chemical formula (11)

represents a group of substituted or non-substituted phenylsulfanyl groups in which R₆ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a C00R group, a S0 8 group (R₇ represents either one of H, Na, K, CH₃ and C2H5; and R₈ represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H5 group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, Rδ may be the same or different for each unit; the chemical formula (12) :

represents a group of substituted or non-substituted (phenylmethyl) sulfanyl groups in which R₉ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COORio group, a S0₂Rn group (Rio represents either one of H, Na, . K, CH₃ and C₂H₅; and Rn represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H5 group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R₉ may be the same or different for each unit; the chemical formula (13) :

represents a 2-thienyl group; the chemical formula (14)

represents a 2-thienylsulfanyl group; the chemical formula (15) :

represents a 2-thienylcarbonyl group; the chemical, formula (16) :

represents a group of substituted or non-substituted phenylsulfinyl groups in which Rι₂ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COOR_X3 group, a S0₂Rι group (Rι₃ represents either one of H, Na, K, CH₃ and C₂H5; and Rι represents either one of OH, ONa, OK, a halogen atom, 0CH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R₁₂ may be the same or different for each unit; the chemical formula (17) :

represents a group of substituted or non-substituted phenylsulfonyl groups in which R₁₅ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COOR16 group, a S0₂Rι group (Rι₆ represents either one ^■'of H, Na, K, CH₃ and C₂H₅; and Rχ₇ represents either one of OH, ONa, OK, a halogen atom, OCH₃ and 0C₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R_i5 may be the same or different for each unit; and the chemical formula (18):

represents a (phenylmethyl) oxy group.

The producing methods therefor are mainly classified to: a method of oxidizing a double bond portion in a polyhydroxy alkanoate copolymer (hereinafter also called a precursor vinyl PHA) including a 3-hydroxy- ω-alkenoic acid unit having a carbon-carbon double bond at an end of a side chain as represented in a chemical formula (1)

in which n represents an integer selected within a range indicated in the chemical formula; and in case plural units are present, such units may be mutually different) , and a unit represented by a chemical formula (2) or a chemical formula (3); and a method of hydrolyzing an alkoxycarbonyl portion in a polyhydroxy alkanoate copolymer (hereinafter also called an alkoxycarbonyl PHA) including a 3-hydroxy-ω-alkoxyalkanoic acid unit having an ester group at an end of a side chain as represented in a chemical formula (48):

n =1-8 ( 8) in which n represents an integer selected within a range indicated in the chemical formula; R₄₇ represents any of residues indicated in the chemical formula; and in case plural units are present, n and R₄ι may be the same or different for each unit, and a unit represented by a chemical formula (2) or a chemical formula (3) . In the following, the precursor vinyl PHA and the precursor alkoxycarbonyl PHA may be collectively called a precursor PHA. A producing method for such precursor PHA is not particularly restricted, but there can be employed a microbial production using microorganisms, a method using a genetically modified plant, or a chemical polymerization. Preferably a method by microbial production is employed.

The precursor vinyl PHA and the precursor ester (alkoxycarbonyl) PHA were synthesized for the first time by the present inventors, and the present invention therefore includes also the precursor vinyl PHA and the precursor ester PHA themselves, and a production process thereof by microorganisms. Also such precursor vinyl PHA and precursor ester PHA can be effectively utilized not only for the carboxyl PHA which is an object of the present invention but also for introducing other functional groups .

In the following, there will be explained a producing method employing each precursor PHA.

The precursor vinyl PHA can be producing by culturing a microorganism in a culture medium including an ω-alkenoic acid represented by a chemical formula (24) and a compound represented by a chemical formula (25) or an ω-cyclohexylalkanoic acid ^■ represented by a chemical formula (26) .

Similarly, the precursor alkoxycarbonyl PHA can be producing by culturing a microorganism in a culture medium including a carboxylic acid monoester compound represented by a chemical formula (49) and a compound represented by the chemical formula (25) or an ω-cyclohexylalkanoic acid represented by the chemical formula (26) .

The chemical formulas (24), (49), (25) and (26) are as follows:

Chemical Formula (24) H₂C=HC (CH₂)_P CH₂ CH₂ C OH

P = ^{1 "8} (24)

Chemical Formula ( 49 )

(wherein p is an integer selected within a range indicated in the chemical formula; and R₄₈ is either one of residues shown in the chemical formula.) Chemical Formula (25)

R^—(CH₂)q-CH—CH—C-OH q = 1-8 (25)

(wherein q is an integer selected within a range indicated in the chemical formula; and R₂₃ represents a residue including a phenyl structure or a thienyl structure. ) Chemical Formula (26)

(wherein R₂₄ is a substituent on the cyclohexyl group and represents a hydrogen atom, a CN group, a N0₂ group, a halogen atom, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and r is an integer selected within a range indicated in the chemical formula.)

More specifically, each precursor PHA can be more advantageously prepared by culturing a microorganism in a culture medium containing respective raw material compounds, namely, for the precursor vinyl PHA, a combination of at least one ω- alkenoic acid represented by the chemical formula (24) and at least one compound represented by the chemical formula (25) or at least one ω- cyclohexylalkanoic acid represented by the chemical formula (26) ; and for the precursor alkoxycarbonyl PHA, a combination of at least one carboxylic acid monoester compound represented by the chemical formula (49) and at least one compound represented by the chemical formula (25) or at least one ω- cyclohexylalkanoic acid represented by the chemical formula (26) , and further- containing at least one of ■ peptide, yeast extract, organic acid or salt thereof, amino acid or a salt thereof, sugar, and linear alkanoic acid with 4 to 12 carbon atoms or salt thereof.

As preferable nutrients to be added to the culture medium, the peptide being polypeptone; one or more organic acids selected from a group of piruvic acid, oxaloacetic acid, citric acid, isocitric acid, ketoglutaric acid, succinic acid, fumaric acid, malic acid, lactic acid and salts thereof; one or more amino acids selected from a group of glutamie acid, aspartic acid and salts thereof; and one or more sugars selected from a group of glyceraldehyde, erythrose, arabinose, xylose, glucose, galactose, mannose, fructose, glycerol, erythritol, xylitol, gluconic acid, glucuronic acid, galacturonic acid, maltose, sucrose and lactose.

In the producing method of the precursor PHA copolymer of the present invention, detailed microbial culture conditions are as follows. The following necessary substrates and nutrients are added to an inorganic salt culture medium based on a phosphate buffer and an ammonium salt or a nitrate salt.

The raw material compound for each precursor PHA, namely, for the precursor vinyl PHA, a combination of at least an ω-alkenoic acid represented by the chemical formula (24) and at least a compound represented by the chemical formula (25) or at least an ω-cyclohexylalkanoic acid represented by the chemical formula (26) ; or for the precursor alkoxycarbonyl PHA, a combination of at least a carboxylic acid monoester compound represented by the chemical formula (49) and at least a compound represented by the chemical formula (25) or at least an ω-cyclohexylalkanoic acid represented by the chemical formula (26) , is preferably contained in the culture medium in a proportion of 0.01 to 1 % (w/v), further preferably 0.02 to 0.2 % .

The aforementioned nutrients as a carbon source and a nitrogen source for proliferation, and as an energy source for polyhydroxy alkanoate production are preferably added to the culture medium in a proportion of 0.1 to 5 % (v/v) per medium, more preferably 0.2 to 2 % .

It can be employed any inorganic salt culture medium containing a phosphate salt and a nitrogen source such as an ammonium salt or a nitrate salt, but the PHA productivity can be improved by regulating the concentration of the nitrogen source. The culture temperature can be any temperature at which the microorganism can satisfactorily proliferate, and is usually within a range of 15 to 37°C, preferably 20 to 30°C.

The culture may be carried out by any culture method so long as the microorganisms can proliferate and produce PHA, such as a liquid culture or a solid culture. Also it may be batch culture, fed batch culture, semi-continuous culture or continuous culture. For example, for liquid batch culture, the oxygen supply method may be shaking using a shaking flask or agitation aeration in a jar fermenter.

In order to make the microorganism produce and accumulate PHA, there can be employed, in addition to the aforementioned method, a method of transferring the cell, after sufficient proliferation, to a culture medium limited in a nitrogen source such as ammonium chloride and to continue culture further in the presence of a compound being a substrate for the desired unit, thereby improving the productivity.

Thus the method for producing precursor vinyl PHA of the present invention may comprise the steps of: culturing a production microorganism under the aforementioned conditions, and recovering produced PHA from the cells, the PHA copolymer produced by the microorganism at least containing a 3-hydroxy-ω- alkenoic acid unit represented by the chemical formula (1), and a unit represented by the chemical formula (2) or an ω-cyclohexylalkanoic acid unit represented by the chemical formula (3) in the molecule.

Also the method for producing precursor alkoxycarbonyl PHA of the present invention may comprise the steps of: culturing a production microorganism under the aforementioned conditions, and recovering from the cells a polyhydroxy alkanoate copolymer produced by the microorganism which at least contains a 3-hydroxy-ω-alkoxycarbonylalkanoic acid unit represented by the chemical formula (48), and a unit represented by the chemical formula (2) or an ω-cyclohexylalkanoic acid unit represented by the chemical formula (3) in the molecule.

The object PHA can be recovered from the cells by an ordinarily employed method. For example, an extraction with an organic solvent such as chloroform, dichloromethane, ethyl acetate or acetone is most simple, but there may also be employed dioxane, tetrahydrofuran or acetonitrile. Also in a situation where an organic solvent is difficult to use, it is also possible to physically break the cells, for example by treating the cells with a surfactant such as SDS, chemicals such as hypochlorous acid and EDTA, or with an enzyme such as lysozynae, or by ultrasonic disruption, homogenizer disruption, pressure disruption, beads impulse, grinding or pounding or freeze-and-thawing, to remove cell components other than PHA and recover PHA.

A production microorganism to be employed in the production method of the present invention can be any microorganisms having an ability meeting the aforementioned conditions, but there are preferred those belonging to the Pseudomonas genus, and more preferably Pseudomonas cichorii , Pseudomonas putida , Pseudomonas fluorecense, Pseudomonas oleovorans, Pseudomonas aeruginosa , Pseudomonas stutzeri or Pseudomonas jessenii . More specific examples include Pseudomonas cichorii YN2 (FERM BP-7375) , Pseudomonas cichorii H45 (FERM BP-7374), Pseudomonas jessenii P161 (FERM BP-7376), and Pseudomonas putida P91 (FERM BP-7373) . These four types of strains are deposited on November 20, 2000 at International Patent Organism Depositary, National Institute of Bioscience and Human-Technology, Agency of Industry Science and Technology (independent administrative corporation) , Tsukuba Central 6, 1-1, Higashi 1-chome, Tsukuba-shi, Ibaraki-ken 305-8566, Japan, and described in the Japanese Patent Application Laid-Open No. 2002-80571. In the present invention the methods for culture of the microorganism, PHA production and accumulation by the microorganism, and for PHA recovery from the cells are not limited to the methods explained above.

The following is a composition of an inorganic salt M9 culture medium employed in the method of the present invention.

[M9 culture medium] Na₂HP0₄ 6.3

KH₂P0₄ 3.0

NaCl 0.5

NH₄C1 1.0

(in g/L; pH 7.0)

For satisfactory proliferation and resulting PHA production, the above-mentioned inorganic culture medium has to be replenished with the essential trace elements by adding the following trace component solution by about 0.3 % '(v/v).

[Minor component solution] nytrilotriacetic acid 1.5;

MgS0₄ 3.0,

MnS0₄ 0.5,

NaCl 1.0,

FeS0₄ 0.1,

CaCl₂ 0.1,

CoCl₂ 0.1,

ZnS0₄ 0.1,

CuS0₄ 0.1,

A1K(S0₄)₂ 0.1, H₃B0₃ 0.1, Na₂Mo0₄ 0.1, NiCl₂ 0.1,

(in g/L) .

The polyhydroxy alkanoates synthesized by the afore entioned producing method, a polyhydroxy alkanoate copolymer including a unit represented by the chemical formula (1) and a unit represented by the chemical formula (2) or a unit represented by the chemical formula (3) can be oxidized at the carbon- carbon double bond portion to give a polyhydroxy alkanoate copolymer including a unit represented by the chemical formula (19), and a unit represented by the chemical formula (2) or a unit represented by the chemical formula (3) . For obtaining a carboxylic acid by oxidizing a carbon-carbon double bond with an oxidant, there are known, for example, a method of utilizing a permanganate salt (J. Chem. Soc Perkin. Trans. 1, 806(1973)); a method of utilizing a bichromate salt (Org. Synth., 4, 698(1963)); a method of utilizing a periodate salt (J. Org. Chem., 46, 19(1981)); a method of utilizing nitric acid (Japanese Patent Application Laid-Open No. S59- 190945) ; a method of utilizing ozone (J. Am. Chem. Soc, 81, 4273(1959)) etc, and, on polyhydroxy alkanoate, Macromolecular chemistry, 4, 289-293(2001) reports a method of obtaining a carboxylic acid by oxidizing the carbon-carbon double bond at the end of the side chain of polyhydroxy alkanoate with potassium permanganate as an oxidant and under an acidic condition. A similar method can be utilized also in the present invention.

The oxidant to be employed in the present invention, though not particularly limited, is preferably a permanganate salt. Such permanganate salt to be employed as the oxidant is usually potassium permanganate. Since the oxidation reaction is a stoichiometric reaction, the amount of the permanganate salt is usually 1 molar equivalent or more with respect to 1 mole of the unit represented by the chemical formula (1), preferably 2 to 10 molar equivalents . For executing the reaction under an acidic condition, there is usually employed an inorganic acid such as sulfuric acid, hydrochloric acid, acetic acid or nitric acid, or an organic acid. However the use of sulfuric acid, nitric acid or hydrochloric acid may cause cleavage of an ester bond in the main chain of polyhydroxy alkanoate, thereby resulting in a decrease in the molecular weight. It is therefore preferable to employ acetic acid. An amount of acid is usually within a range of 0.2 to 2000 molar equivalents per 1 mole of the unit represented by the chemical formula (1), preferably 0.4 to 1000 molar equivalents. An amount less than 0.2 molar equivalents results in a low yield, while an amount exceeding 2000 molar equivalents generates by- products by decomposition with acid. Also a crown ether may be employed for the purpose of accelerating the reaction. In this case, crown ether and permanganate salt form a complex, thereby providing an effect of increasing the reaction activity. As the crown ether, there is generally employed dibenzo- 18-crown-6-ether, dicyclo-18-crown-6-ether, or 18- crown-6-ether . An amount of crown ether is generally within a range of 0.005 to 2.0 molar equivalents per 1 mole of permanganate salt, preferably 0.05 to 1.5 molar equivalents.

As a solvent to be employed in the oxidation reaction of the present invention, there may be employed any solvent inert to the reaction without particular limitation, for example water, acetone; an ether such as tetrahydrofuran or dioxane; an aromatic hydrocarbon such as benzene; an aliphatic hydrocarbon such as hexane or heptane; or a halogenated hydrocarbon such as methyl chloride, dichloromethane or chloroform. Among these solvents, in consideration of dissolving property for polyydroxy alkanoate, a halogenated hydrocarbon such as methyl chloride, dichloromethane or chloroform, or acetone is preferred.

In the aforementioned oxidation reaction of the present invention, a precursor vinyl PHA, a permanganate salt and an acid may be introduced into a solvent at a time from the beginning and reacted together, or they may be added to the reaction system one by one continuously or intermittently to be , _{Λ Λ} „ 4/044213

- 38 -

reacted. Or first a permanganate alone is dissolved or suspended in a solvent, followed by continuous or intermittent addition of a polyhydroxyalkanoate and an acid to the reaction system, or first a ^• polyhydroxyalkanoate alone is dissolved or suspended in a solvent, followed by continuous or intermittent addition of a permanganate and an acid to the reaction system. Further, first a polyhydroxyalkanoate and an acid are introduced into a solvent and then a permanganate is added to the reaction system continuously or intermittently to be reacted, or first permanganate and an acid are introduced into a solvent and then polyhydroxyalkanoate is added to the reaction system continuously or intermittently, or first a polyhydroxyalkanoate and a permanganate are introduced into a solvent and then an acid is added to the reaction system continuously and intermittently to be reacted. A reaction temperature is selected generally within a range from -40 to 40°C, preferably -10 to 30°C. A reaction time depends on a stoichiometric ratio of the unit represented by the chemical formula (1) and permanganate salt and the reaction temperature, but is generally selected within a range of 2 to 48 hours.

Also in the oxidation reaction of the present invention, in case R₂ in the unit represented by the chemical formula (2) is a residue represented by the chemical formula (11), a sulfide bond therein may be converted into a sulfoxide or a sulfone. Next, there will be explained the producing method of the precursor ester PHA of the present invention employing, as a starting material, a polyhydroxy alkanoate copolymer including a unit represented by the chemical formula (48), and a unit represented by a chemical formula (2) or a unit represented by a chemical formula (3) .

A precursor ester PHA synthesized can provide the carboxyl PHA by hydrolysis in the presence of an acid or an alkali or hydrogenolysis including catalytic reduction of an ester bond portion shown in the chemical formula (48) . Such method of hydrolysis in the presence of an acid or an alkali can be carried out by employing, in a water-miscible organic solvent such as methanol, ethanol, tetrahydrofuran, dioxane, dimethylformamide or dimethylsulfoxide, an aqueous solution or an inorganic acid such as hydrochloric acid, sulfuric acid, nitric acid or phosphoric acid; an organic acid such as trifluoroacetic acid, trichloroacetic acid, p- toluenesulfonic acid or methanesulfonic acid; an aqueous caustic alkali such as sodium hydroxide or potassium hydroxide; an aqueous solution or an alkali carbonate such as sodium carbonate or potassium carbonate; or an alcoholic solution of a metal alkoxide such as sodium methoxide or sodium ethoxide . The reaction temperature is selected ordinarily from 0 to 40°C, preferably from 0 to 30°C. The reaction period is ordinarily selected from 0.5 to 48 hours. However, a hydrolysis with an acid or an alkali may also cause a cleavage of an ester bonding of the main molecular chain, thereby resulting in a decrease in the molecular weight.

Also the method of obtaining a carboxylic acid by hydrogenolysis including catalytic reduction is carried out in the following manner. Catalytic reduction is carried out in a suitable solvent and within a temperature range from -20°C to the boiling point of the used solvent, preferably from 0 to 50°C, by reacting hydrogen under a normal pressure or an elevated pressure in the presence of a reducing catalyst. Examples of the usable solvent include water, methanol, ethanol, propanol, ethyl acetate, diethyl ether, tetrahydrofuran, dioxane, benzene, toluene, dimethylformamide and pyridine. In consideration of the solubility, tetrahydrofuran, toluene or dimethylformamide is particularly preferable. As the reducing catalyst, there can be employed palladium, platinum or rhodium either singly or held on a carrier, or Raney nickel. However, the catalytic reduction may also cause cleavage of an ester bonding of the main molecular chain to decrease the molecular weight.

In the following, the present invention will be explained in more details by examples thereof. These examples represent examples of the optimum embodiments of the present invention, but the present invention is by no means limited by these examples. [Examples] [Example 1]

0.5% of polypeptone (supplied by Wako Pure Chemical Co.), 6 mmol/L of 5-phenoxyvaleric acid, and 1 mmol/L of 10-undecenoic acid were dissolved in 200 ml of an aforementioned M9 culture medium, which was placed in a 200 ml shaking flask, then sterilized in an autoclave and cooled to the room temperature. Then 2 ml of a culture liquid of Pseudomonas cichorii YN2, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to the prepared culture medium, and culture was conducted for 64 hours at 30°C. After the culture, the cells were collected by centrifugation, washed with methanol and dried. The dried cells, after weighing, were put in chloroform ^' and stirred for 72 hours at 35°C to extract a polymer, The chloroform extract was filtered, then concentrated on an evaporator, and a solid precipitate formed by an addition of cold methanol was collected and dried under a reduced pressure to obtain a desired polymer.

Structure of the obtained polymer was determined by ^XH-NMR (FT-NMR: Bruker DPX400; resonance frequency: 400 MHz; measured nucleus species: ¹H; solvent: CDC1₃; reference: capillary- sealed TMS/CDC1₃; measurement temperature: room temperature) and ¹³C-NMR (FT-NMR: Bruker DPX400; resonance frequency: 100 MHz; measured nucleus species: ¹³C; solvent: CDC1₃; reference: capillary- sealed TMS/CDC1₃; measurement temperature: room temperature) .

Fig. 1 shows a ¹H-NMR spectrum of the obtained polymer. As a result, the obtained polymer was confirmed being a polyhydroxy alkanoate copolymer including a unit represented by the following chemical formula (50) (A : B+C+D : others (linear 3- hydroxyalkanoic acid with 4 to 12 carbon atoms and 3- hydroxylalk-5-enoic acid with 10 or 12 carbon atoms) = 87 : 9 : 4) . Also ¹³C-NMR confirmed presence of the unit B which is a 3-hydroxy-10-undecenoic acid unit and both of the unit C which is a 3-hydroxy-8- nonenoic acid unit and the unit D which is a 3- hydroxy-6-heptenoic acid unit, but the ratio of the units B, C and D was not determined. - 43 -

A B D

.

-{

The molecular weight of the obtained polymer was measured by gel permeation chromatography (GPC) (Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, molecular weight converted into polystyrene) .

The obtained polymer dry weight (PDW) was 0.19 g/L and the number-averaged molecular weight was 30,000. [Example 2]

A desired polymer was obtained in the same manner as in Example 1, except that 5-phenoxyvaleric acid employed in Example 1 was changed to 4- phenoxybutyric acid. Structure of the obtained polymer was determined by ^XH-NMR and ¹³C-NMR (FT-NMR: Bruker DPX400 as in Example 1. As a result, the obtained polymer was confirmed being a polyhydroxy alkanoate copolymer including units represented by the following chemical formula (51) (A : B+C+D : others (linear 3-hydroxyalkanoic acid with 4 to 12 carbon atoms and 3-hydroxylalk-5-enoic acid with 10 or 12 carbon atoms) = 72 : 11 : 15) . Also ¹³C-NMR confirmed the presence of the unit B which is a 3-hydroxy-10- undecenoic acid unit and both of the unit C which is a 3-hydroxy-8-nonenoic acid unit and the unit D which is a 3-hydroxy-6-heptenoic acid unit, but the ratio of the units B, C and D was not determined.

A B C D

-|

The molecular weight of the obtained polymer was measured by GPC as in Example 1.

The obtained polymer weighed (PDW) 0.05 g/L and a number-averaged molecular weight was 25,000. [Example 3]

A desired polymer was obtained in the same manner as in Example 1, except that 5-phenoxyvaleric acid employed in Example 1 was changed to 4- cyclohexylbutyric acid.

Structure of the obtained polymer obtained by ^XH-NMR and ¹³C-NMR as in Example 1 was determined to confirm that the polyhydroxy alkanoate copolymer includes units represented by the following chemical formula (52) (A+others (linear 3-hydroxyalkanoic acid with 4 to 12 carbon atoms and 3-hydroxylalk-5-enoic acid with 10 or 12 carbon atoms) : B+C+D = 89 : 11) . Also ¹³C-NMR confirmed the presence of the unit B being a 3-hydroxy-10-undecenoic acid unit and both of the unit C being a 3-hydroxy-8-nonenoic acid unit and the unit D being a 3-hydroxy-6-heptenoic acid unit, but the ratio of the units B, C and D was not determined.

A B C D

The obtained polymer weighed (PDW) 0.52 g/L and the number-averaged molecular weight was 154,000. [Example 4] A desired polymer was obtained in the same manner as in Example 3, except that polypeptone employed in Example 3 was changed to yeast extract.

Structure of the obtained polymer was determined by ^XH-NMR and ¹³C-NMR as in Example 1 to confirm the polymer being a polyhydroxy alkanoate copolymer including units represented by the following chemical formula (52) (A+others (linear 3- hydroxyalkanoic acid with 4 to 12 carbon atoms and 3- hydroxylalk-5-enoic acid with 10 or 12 carbon atoms) : B+C+D = 85 : 15) . Also ¹³C-NMR confirmed the presence of the unit B is a 3-hydroxy-10-undecenqic acid unit and both of the unit C being a 3-hydroxy-8- nonenoic acid unit and the unit D being a 3-hydroxy- 6-heptenoic acid unit, but the ratio of the units B, C and D was not determined.

A B C D

The obtained polymer weighed (PDW) 0.45 g/L and the number-averaged molecular weight was 132,000. [Example 5]

A polymer was obtained in the same manner as in Example 3, except that the strain YN2 employed in Example 3 was replaced by Pseudomonas cichorii H45 and polypeptone was changed to glucose. Structure of the obtained polymer was determined by ¹H-NMR and ¹³C- NMR as in Example 1 to confirm the polymer being a polyhydroxy alkanoate copolymer including units represented by the following chemical formula (52) (A+others (linear 3-hydroxyalkanoic acid with 4 to 12 carbon atoms and 3-hydroxylalk-5-enoic acid with 10 or 12 carbon atoms) : B+C+D = 83 : 17) . Also ¹³C-NMR confirmed the presence of the unit B being a 3- hydroxy-10-undecenoic acid unit and both of the unit C being a 3-hydroxy-8-nonenoic acid unit and the unit D being a 3-hydroxy-6-heptenoic acid unit, but the ratio of the units B, C and D was not determined.

A B C D

The molecular weight of the obtained polymer was measured by GPC as in Example 1. The obtained polymer weighed (PDW) 0.41 g/L and the number-averaged molecular weight was 164,000. [Example 6]

A polymer was obtained in the same manner as in Example 3, except that the strain YN2 employed in Example 3 was replaced by Pseudomonas cichorii H45 and polypeptone was changed to sodium pyruvate . A structure determination of the obtained polymer was conducted by ^XH-NMR and ¹³C-NMR as in Example 1 to confirm the polymer being a polyhydroxy alkanoate copolymer including units represented by the following chemical formula (52) (A+others (linear 3- hydroxyalkanoic acid with 4 to 12 carbon atoms and 3- hydroxylalk-5-enoic acid with 10 or 12 carbon atoms) : B+C+D = 87 : 13) . Also ¹³C-NMR confirmed the presence of the unit B being a 3-hydroxy-10- undecenoic acid unit and the unit C being a 3- hydroxy-8-nonenoic acid unit and the unit D being a 3-hydroxy-6-heptenoic acid unit, but the ratio of the units B, C and D was not determined.

A B C D

The weight of the obtained polymer (PDW) was 0.28 g/L and the number-averaged molecular weight was 156,000.

[Example 7] A polymer was obtained in the same manner as in Example 3, except that the strain YN2 employed in Example 3 was replaced by Pseudomonas jessenii P161 and polypeptone was changed to sodium glutamate. Structure determination of the obtained polymer was conducted by ^XH-NMR and ¹³C-NMR as in Example 1 to confirm the polymer being a polyhydroxy alkanoate copolymer including units represented by the following chemical formula (52) (A+others (linear 3- hydroxyalkanoic acid with 4 to 12 carbon atoms and 3- hydroxylalk-5-enoic acid with 10 or 12 carbon atoms) : B+C+D = 88 : 12) . Also ¹³C-NMR confirmed the presence of the unit B being a 3-hydroxy-10- undecenoic acid unit and both of the unit C being a 3-hydroxy-8-nonenoic acid unit and the unit D being a 3-hydroxy-6-heptenoic acid unit, but the ratio of the units B, C and D was not determined.

A B C D [

The weight of the obtained polymer (PDW) was 0.38 g/L and the number-averaged molecular weight of 145,000. [Example 8]

A polymer was obtained in the same manner as in Example 3, except that the strain YN2 employed in Example 3 was replaced by Pseudomonas jessenii P161 and 0.5% polypeptone was changed to 0.1% of nonanic acid. The structure determination of the obtained polymer was conducted by ^Η-NMR and ¹³C-NMR as in Example 1 to confirm the polymer being a polyhydroxy alkanoate copolymer including units represented by the following chemical formula (52) (A+others (linear 3-hydroxyalkanoic acid with 4 to 12 carbon atoms and 3-hydroxylalk-5-enoic acid with 10 or 12 carbon atoms) : B+C+D = 80 : 20) . Also ¹³C-NMR confirmed the 5 presence of the unit B being a 3-hydroxy-10- undecenoic acid unit and both of the unit C being a 3-hydroxy-8-nonenoic acid unit and the unit D being a 3-hydroxy-6-heptenoic acid unit, but the ratio of the units B, C and D was not determined.

A B C D

The weight of the obtained polymer (PD ) was

0.18 g/L and the number-averaged molecular weight was

15 132,000.

[Example 9]

Twenty 200 ml shaking flasks were prepared, into which 0.5% of polypeptone (supplied by Wako Pure

Chemical Co.), 6 mmol/L of 5-phenoxyvaleric acid, and

•20 1 mmol/L of 10-undecenoic acid dissolved in 200 ml of an aforementioned M9 culture medium was placed, then sterilized in an autoclave and cooled to the room temperature. Then 2 ml of a culture liquid of Pseudomonas cichorii YN2, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to each flask, and culture was conducted for 64 hours at 30°C, After the culture, all cells were collected by centrifugation, washed with methanol and dried. The dried cells, after weighing, were put in chloroform and stirred for 72 hours at 35°C to extract a polymer, The chloroform extract was filtered, then concentrated on an evaporator, and a solid precipitate formed by an addition of cold methanol was collected and dried under a reduced pressure to obtain a desired polymer.

The obtained PHA polymer weighed 1528 mg (dry weight) in the present example.

The average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 104000 and a weight-averaged molecular weight Mw = 231000. The structure of the obtained polymer was determined by ¹H-NMR and ¹³C-NMR as in Example 1. As a result, confirmed was a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-phenoxyvaleric acid represented by the following chemical formula (53), 3-hydroxy-10- undecenoic acid represented by a chemical formula (5), 3-hydroxy-8-nonenoic acid represented by a chemical formula (6) and 3-hydroxy-6-heptenoic acid represented by a chemical formula (7) .

The proportion of such units confirmed by ^XH-NMR was: 69 mol% of 3-hydroxy-5-phenoxyvaleric acid, 23 mol% of three units of 3-hydroxy-10-undecenoic acid, 3-hydroxy-8-nonenoic acid and 3-hydroxy-6-heptenoic acid in total, and 8 mol% of others (linear 3- hydroxyalkanoic acids of 4 to 12 carbon atoms and 3- hydroxyalk-5-enoic acids with 10 or 12 carbon atoms). The polyhydroxy alkanoate thus obtained was utilized in the following reaction.

303 mg of polyhydroxy alkanoate were charged in a 200-ml eggplant-shaped flask and were dissolved by adding 20 ml of dichloromethane. The solution was placed in an. iced bath, and 3 ml of acetic acid and 300 mg of 18-crown-6-ether were added and agitated. Then, in an iced bath, 241 mg of potassium permanganate were slowly added and an agitation was carried out for 20 hours at the room temperature. After the reaction, 50 ml of water and 500 mg of sodium bisulfite were added. Then the liquid was brought to pH = 1 by 1.0 N hydrochloric acid. After dichloromethane in the mixed solvent was distilled off in an evaporator, a polymer in the solution was recovered. The polymer was recovered by washing with 100 ml of methanol and washing three times with 100 ml of purified water. A drying under a reduced pressure provided 247 mg of the desired PHA.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 29400 and a weight-averaged molecular weight Mw = 102800.

A structure determination of the obtained polymer carried out by ¹H-NMR and ¹³C-NMR as in Example 1 confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3-hydroxy-5- phenoxyvaleric acid represented by the following chemical formula (53) , 3-hydroxy-9-carboxynonanoic acid represented by a chemical formula (54), 3- - 55

hydroxy-7-carboxyheptanoic acid represented by a chemical formula (55) and 3-hydroxy-5-carboxyvaleric acid represented by a chemical formula (56) .

Also a proportion of the units of the obtained PHA was calculated by a methylesterification, utilizing trimethylsilyldiazomethane, of a carboxyl group at an end of a side chain of the PHA. 50 mg of the object PHA were charged in a 100- ml eggplant-shaped flask and were dissolved by adding 3.5 ml of chloroform and 0.7 ml of methanol. The solution was added with 2 ml of a 0.63 mol/L solution of trimethylsilyldiazomethane in hexane (supplied by Tokyo Kasei Kogyo Co.) and was agitated for 30 minutes at the room temperature. After the reaction, the solvent was distilled off in an evaporator to recover a polymer. The polymer was recovered by washing with 50 ml of methanol. A drying under a reduced pressure provided 49 mg of PHA.

NMR analysis as in Example 1 confirmed a proportion of the units in which 3-hydroxy-5- phenoxyvaleric acid was present by 83 mol%, a sum of three units of 3-hydroxy-9-carboxynonanoic acid, 3- hydroxy-7-carboxyheptanoic acid and 3-hydroxy-5- carboxyvaleric acid by 8 mol%, and others (linear 3- hydroxyalkanoic acid of 4 to 12 carbon atoms and 3- hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 9 mol%. [Example 10]

There were prepared twenty 500-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemical Co.), 6 mmol/L of 4- cyclohexylbutyric acid, and 3 mmol/L of 10-undecenoic acid were dissolved in 200 ml of an aforementioned M9 culture medium, which was placed in a 500 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 2 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours, was added to each prepared culture medium, and culture was conducted for 60 hours at 30°C. After the culture, the culture liquids were united, and the cells were recovered by centrifuging, rinsed with methanol and dried. The dried cells, after weighing, were agitated with chloroform for 72 hours at 25°C to extract a polymer. The chloroform extract was filtered with a 0.45 μm membrane filter, then concentrated in an evaporator, and the polymer was recovered by a reprecipitation in cold methanol. A desired polymer was then obtained by drying under a reduced pressure.

According to a weighing of the obtained polymer, 1433 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 143000 and a weight-averaged molecular weight Mw = 458000.

A structure of the obtained PHA was determined by a NMR analysis as in Example 1.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-cyclohexylbutyric acid represented by the following chemical formula (57), 3-hydroxy-10- undecenoic acid represented by a chemical formula (5) , 3-hydroxy-8-nonenoic acid represented by a chemical formula (6) and 3-hydroxy-6-heptenoic acid represented by a chemical formula (7).

Also a proportion of such units was confirmed by ¹H-NMR spectrum, where a sum of three units of 3- hydroxy-10-undecenoic acid, 3-hydroxy-8-nonenoic acid and 3-hydroxy-6-heptenoic acid was present by 37 mol%, and 3-hydroxy-4-cyclohexylbutyric acid and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 63 mol%.

The polyhydroxy alkanoate thus obtained was utilized in the following reaction.

301 mg of polyhydroxy alkanoate were charged in a 200-ml eggplant-shaped flask and were dissolved by adding 20 ml of dichloromethane. The solution was placed in an iced bath, and 3 ml of acetic acid and 541 mg of 18-crown-6-ether were added and agitated. Then, in an iced bath, 430 mg of potassium permanganate were slowly added and an agitation was carried out for 20 hours at the room temperature. After the reaction, 50 ml of water and 1000 mg of sodium bisulfite were added. Then the liquid was brought to pH = 1 by 1.0 N hydrochloric acid. After dichloromethane in the mixed solvent was distilled off in an evaporator, a polymer in the solution was recovered. The polymer was recovered by washing with 100 ml of methanol and washing three times with 100 ml of purified water. A drying under a reduced pressure provided 184 mg of the desired PHA. An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 111800 and a weight-averaged molecular weight Mw = 272800.

For specifying the structure of the obtained PHA, a NMR analysis was carried out under conditions same as in Example 1. As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-4-cyclohexylvaleric acid represented by the 4/04421

- 61

following chemical formula (57), 3-hydroxy-9- carboxynonanoic acid represented by a chemical formula (54), 3-hydroxy-7-carboxyheptanoic acid represented by a chemical formula (55) and 3-hydroxy- 5-carboxyvaleric acid represented by a chemical formula (56) .

Also a proportion of the units of the obtained PHA was calculated by a methylesterification, utilizing trimethylsilyldiazomethane, of a carboxyl group at an end of a side chain of the PHA.

30 mg of the object PHA were charged in a 100- ml eggplant-shaped flask and were dissolved by adding 2.1 ml of chloroform and 0.4 ml of methanol . The solution was added with 0.9 ml of a 0.63 mol/L solution of trimethylsilyldiazomethane in hexane

(supplied by Tokyo Kasei Kogyo Co.) and was agitated for 30 minutes at the room temperature. After the reaction, the solvent was distilled off in an evaporator to recover a polymer. The polymer was recovered by washing with 50 ml of methanol. -A drying under a reduced pressure provided 31 mg of PHA.

A NMR analysis was carried out as in Example 1. As a result, there was confirmed a proportion of the units in which a sum of three units of 3-hydroxy-9- carboxynonanoic acid, 3-hydroxy-7-carboxyheptanoic acid and 3-hydroxy-5-carboxyvaleric acid was present by 9 mol%, and 3-hydroxy-4-cyclohexyl butyric acid and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 91 mol%. [Example 11]

There were prepared three 2000-ml shake flasks, and, in each, 0.5 wt . % of polypeptone (supplied by Wako Pure Chemical Co.), 4.8 mmol/L of 5- (phenylsulfanyl) aleric acid, and 2 mmol/L of 10- undecenoic acid were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 10 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours, was added to each prepared culture medium, and culture was conducted for 38 hours at 30°C. After the culture, the culture liquids were united, and the cells were recovered by centrifuging, rinsed with methanol and dried. The dried cells, after weighing, were agitated with chloroform for 25 hours at 35°C to extract a polymer. The chloroform extract was filtered with a 0.4,5 μm membrane filter, then concentrated in an evaporator, and the polymer was recovered by a reprecipitation in cold methanol. A desired polymer was then obtained by drying under a reduced pressure.

According to a weighing of the obtained polymer, 1934 mg (dry weight) of PHA were obtained in the present example .

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 150000 and a weight-averaged molecular weight Mw .= 430000. A structure of the obtained PHA was determined by a NMR analysis as in Example 1. An obtained ^XH-NMR spectrum is shown in Fig. 3.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5- (phenylsulfanyl) valeric acid represented by the following chemical formula (58), 3-hydroxy-10- undecenoic acid represented by a chemical formula (5) 3-hydroxy-8-nonenoic acid represented by a chemical formula (6) and 3-hydroxy-6-heptenoic acid represented by a chemical formula (7) .

65 -

(6)

Also a proportion of such units was confirmed by ¹H-NMR spectrum, where 3-hydroxy-5- (phenylsulfanyl) valeric acid was present by 78 mol%, a- sum of three units of 3-hydroxy-10-undecenoic acid, 3-hydroxy-8-nonenoic acid and 3-hydroxy-6-heptenoic acid by 19 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 3 mol%.

The polyhydroxy alkanoate thus obtained was utilized in the following reaction. 302 mg of , polyhydroxy alkanoate were charged in a 200-ml eggplant-shaped flask and were dissolved by adding 20 ml of dichloromethane. The solution was placed in an iced bath, and 3 ml of acetic acid and 1154 mg of 18- crown-6-ether were added and agitated. Then, in an iced bath, 917 mg of potassium permanganate were slowly added and an agitation was carried out for 19 hours at the room temperature. After the reaction, 50 ml of water and 3010 mg of sodium bisulfite were added. Then the liquid was brought to pH = 1 by 1.0 N hydrochloric acid. After dichloromethane in the mixed solvent was distilled off in an evaporator, a polymer in the solution was recovered. The polymer was recovered by washing with 100 ml of methanol and washing three times with 100 ml of purified water. A drying under a reduced pressure provided 311 mg of the desired PHA.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 62000 and a weight-averaged molecular weight Mw = 260000.

For specifying the structure of the obtained PHA, a NMR analysis was carried out under conditions same as in Example 1. An obtained ¹H-NMR spectrum is shown in Fig. 4.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5- (phenylsulfonyl) valeric acid represented by the following chemical formula (59) , 3-hydroxy-9- carboxynonanoic acid represented by a chemical formula (54), 3-hydroxy-7-carboxyheptanoic acid represented by a chemical formula (55) and 3-hydroxy- 5-carboxyvaleric acid represented by a chemical formula (56) .

30 mg of the object PHA were charged in a 100- ml eggplant-shaped flask and were dissolved by adding 2.1 ml of chloroform and 0.7 ml of methanol. The solution was added with 0.5 ml of a 2 mol/L solution of trimethylsilyldiazomethane in hexane (supplied by Aldrich Inc.) and was agitated for 30 minutes at the room temperature. After the reaction, the solvent was distilled off in an evaporator to recover a polymer. The polymer was recovered by washing with

50 ml of methanol. A drying under a reduced pressure provided 31 mg of PHA.

A NMR analysis was carried out as in Example 1. As a result, ¹H-NMR spectrum confirmed a proportion of the units in which 3-hydroxy-5-

(phenylsulfonyl) valeric acid was present by 89 mol%, a sum of three units of 3-hydroxy-9-carboxynonanoic acid, 3-hydroxy-7-carboxyheptanoic acid and 3- hydroxy-5-carboxyvaleric acid by 8 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 3 mol% . [Example 12] There were prepared three 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemical Co.), 6 mmol/L of 5-phenylvaleric acid, and 1.5 mmol/L of 10-undecenoic acid were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 10 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours, was added to each prepared culture medium, and culture was conducted for 60 hours at 30°C. After the culture, the culture liquids were united, and the cells were recovered by centrifuging, rinsed with methanol and dried. The dried cells, after weighing, were agitated with chloroform for 72 hours at 35°C to extract a polymer. The chloroform extract was filtered with a 0.45 μm membrane filter, then concentrated in an evaporator, and the polymer was recovered by a reprecipitation in cold methanol. A desired polymer was then obtained by drying under a reduced pressure. According to a weighing of the obtained polymer, 1533 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 72000 and a weight-averaged molecular weight Mw = 170000. A structure of the obtained PHA was determined by a NMR analysis as in Example 1.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-phenylvaleric acid represented by the following chemical formula (60), 3-hydroxy-10- undecenoic acid represented by a chemical formula (5) , 3-hydroxy-8-nonenoic acid represented by a chemical formula (6) and 3-hydroxy-6-heptenoic acid represented by a chemical formula (7) .

(6)

(7)

Also a proportion of such units was confirmed by ^-NMR spectrum, where a sum of three units of 3- hydroxy-10-undecenoic acid, 3-hydroxy-8-nonenoic acid and 3-hydroxy-6-heptenoic acid was present by 12 mol%, 3-hydroxy-5-phenylvaleric acid by 85 mol% and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 3 mol%.

The polyhydroxy alkanoate thus obtained was utilized in the following reaction.

1002 mg of polyhydroxy alkanoate were charged in a 500-ml eggplant-shaped flask and were dissolved by adding 60 ml of dichloromethane. The solution was placed in an iced bath, and 10 ml of acetic acid and 537 mg of 18-crown-6-ether were added and agitated. Then, in an iced bath, 429 mg of potassium permanganate were slowly added and an agitation was carried out for 2 hours in an iced bath and 18 hours at the room temperature. After the reaction, 40 ml of ethyl acetate, 30 ml of water and 1000 mg of sodium bisulfite were added. Then the liquid was brought to pH = 1 by 1.0 N hydrochloric acid. A polymer was recovered by extraction followed by distilling off of the solvent. The polymer was recovered by washing with 300 ml of purified water, then with 200 ml of methanol, three times with 200 ml of purified water and finally with 200 ml of methanol. The obtained polymer was dissolved in 10 ml of tetrahydrofuran and dialyzed for 1 day with a dialysis film (manufactured by Spectrum Inc., Stectra/Por Standard Regenerated Cellulose Dialysis Membrane 3) , in a 1-L beaker containing 500 ml of methanol. The polymer present in the dialysis film was recovered and dried under a reduced pressure to obtain 953 mg of a desired PHA.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 43000 and a weight-averaged molecular weight Mw = 94000.

For specifying the structure of the obtained PHA, a NMR analysis was carried out under conditions same as in Example 1.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-phenylvaleric acid represented by the following chemical formula (60), 3-hydroxy-9- carboxynonanoic acid represented by a chemical formula (54), 3-hydroxy-7-carboxyheptanoic acid represented by a chemical formula (55) and 3-hydroxy- 5-carboxyvaleric acid represented by a chemical formula (56) .

30 mg of the object PHA were charged in a 100- ml eggplant-shaped flask and were dissolved by adding 2.1 ml of chloroform and 0.7 ml of methanol. The solution was added with 0.5 ml of a 2 mol/L solution of trimethylsilyldiazomethane in hexane (supplied by Aldrich Inc.) and was agitated for 30 minutes at the room temperature. After the reaction, the solvent was distilled off in an evaporator to recover a polymer. The polymer was recovered by washing with 50 ml of methanol. Drying under a reduced pressure provided 30 mg of PHA.

A NMR analysis was carried out as in Example 1. As a result, ^""Ή-NMR spectrum confirmed a proportion of the units in which 3-hydroxy-5-phenylvaleric acid was present by 86 mol%, a sum of three units of 3- hydroxy-9-carboxynonanoic acid, 3-hydroxy-7- carboxyheptanoic acid and 3-hydroxy-5-carboxyvaleric acid by 9 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 5 mol%. [Example 13]

500 mg of polyhydroxy alkanoate copolymer, including 3-hydroxy-5-phenylvaleric acid represented by the following chemical formula (60), 3-hydroxy-10- undecenoic acid represented by a chemical formula (5) , 3-hydroxy-8-nonenoic acid represented by a chemical formula (6) and 3-hydroxy-6-heptenoic acid represented by a chemical formula (7) as monomer units used for the bacterial production in Example 12 were changed in a 500-ml three-necked flask, and were suspended by adding 150 ml of distilled water containing 50 ppm of hydrogen peroxide. Ozone was blown in with a rate of 50 g/hr and the mixture was agitated for 3 hours at the room temperature.

After the reaction, the reaction liquid was filtered to recover a polymer. The polymer was resuspended in distilled water, and centrifuged to wash off remaining hydrogen peroxide. The obtained polymer was further dissolved in 5 ml of tetrahydrofuran and dialyzed for 1 day with a dialysis film (manufactured by Spectrum Inc.,

Stectra/Por Standard Regenerated Cellulose Dialysis Membrane 3), in a 300-ml beaker containing 250 ml of methanol. The polymer present in the dialysis film was recovered and dried under a reduced pressure to obtain 450 mg of a desired PHA.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 35000 and a weight-averaged molecular weight Mw = 72000. For specifying the structure of the obtained PHA, a NMR analysis was carried out under conditions same as in Example 1.

30 mg of the object PHA were charged in a 100- ml eggplant-shaped flask and were dissolved by adding 2.1 ml of chloroform and 0.7 ml of methanol. The solution was added with 0.3 ml of a 2 mol/L hexane solution of trimethylsilyldiazomethane in hexane (supplied by Aldrich Inc.) and was agitated for 30 minutes at the room temperature. After the reaction, the solvent was distilled off in an evaporator to recover a polymer. The polymer was recovered by . washing with 50 ml of methanol. A drying under a reduced pressure provided 30 mg of PHA.

A NMR analysis was carried out as in Example 1. As a result, there was confirmed a proportion of the units in which 3-hydroxy-5-phenylvaleric acid was present by 85 mol%, a sum of three units of 3- hydroxy-9-carboxynonanoic acid, 3-hydroxy-7- carboxyheptanoic acid and 3-hydroxy-5-carboxyvaleric acid by 10 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 5 mol%. [Example 14] There were prepared five 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemical Co.), 6 mmol/L of 5- (4- vinylphenyl) valeric acid, and 1 mmol/L of 10- undecenoic acid were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 10 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours, was added to each prepared culture medium, and culture was conducted for 60 hours at 30°C. After the culture, the culture liquids were united, and the cells were recovered by centrifuging, rinsed with methanol and dried. The dried cells, after weighing, were agitated with chloroform for 72 hours at 25°C to extract a polymer. The chloroform extract was filtered with a 0.45 μm membrane filter, then concentrated in an evaporator, and the polymer was recovered by a reprecipitation in cold methanol. A desired polymer was then obtained by drying under a reduced pressure.

According to a weighing of the obtained polymer, 1097 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 70000 and a weight-averaged molecular weight Mw = 150000.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5- (4-vinylphenyl) valeric acid represented by the following chemical formula (61), 3-hydroxy-10- undecenoic acid represented by a chemical formula (5), 3-hydroxy-8-nonenoic acid represented by a chemical formula (6) and 3-hydroxy-6-heptenoic acid represented by a chemical formula (7) .

Also a proportion of such units was confirmed by ¹H-NMR spectrum, where a sum of three units of 3- hydroxy-10-undecenoic acid, 3-hydroxy-8-nonenoic acid and 3-hydroxy-6-heptenoic acid was present by 9 mol%, 3-hydroxy-5- (4-vinylphenyl) valeric acid by 84 mol% and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 7 mol%. [Example 15]

There were prepared twenty 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemical Co.), 6 mmol/L of 5-benzoylvaleric acid, and 1 mmol/L of 10-undecenoic acid were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 10 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours, was added to each prepared culture medium, and culture was conducted for 60 hours at 30°C. After the culture, the culture liquids were united, and the cells were recovered by centrifuging, rinsed with methanol and dried. The dried cells, after weighing, were agitated with chloroform for 72 hours at 25°C to extract a polymer. The chloroform extract was filtered with a 0.45 μm membrane filter, then concentrated in an evaporator, and the polymer was recovered by a reprecipitation in cold methanol. A desired polymer was then obtained by drying under a reduced pressure.

According to a weighing of the obtained polymer, 1027 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 120000 and a weight-averaged molecular weight Mw = 370000.

A structure of the obtained PHA was determined by a NMR analysis as in Example 1. As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-benzoylvaleric acid represented by the following chemical formula (62), 3-hydroxy-10- undecenoic acid represented by a chemical formula (5), 3-hydroxy-8-nonenoic acid represented by a chemical formula (6) and 3-hydroxy-6-heptenoic acid represented by a chemical formula (7) .

(62)

Also a proportion of such units was confirmed 04/044213

- 85 -

by ^αH-NMR spectrum, where a sum of three units of 3- hydroxy-10-undecenoic acid, 3-hydroxy-8-nonenoic acid and 3-hydroxy-6-heptenoic acid was present by 11 mol%, 3-hydroxy-5-benzoylvaleric acid by 82 mol% and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 7 mol%.

The polyhydroxy alkanoate thus obtained was utilized in the following reaction. 1003 mg of polyhydroxy alkanoate were charged in a 500-ml eggplant-shaped flask and were dissolved by adding 60 ml of dichloromethane. The solution was placed in an iced bath, and 10 ml of acetic acid and 410 mg of 18-crown-6-ether were added and agitated. Then, in an iced bath, 327 mg of potassium permanganate were slowly added and an agitation was carried out for 2 hours in an iced bath and 18 hours at the room temperature. After the reaction, 100 ml of water and 1000 mg of sodium bisulfite were added. Then the liquid was brought to pH = 1 by 1.0 N hydrochloric acid. After dichloromethane in the mixed solvent was distilled off in an evaporator, a polymer in the solution was recovered. The polymer was recovered by washing with 200 ml of purified water, then with 200 ml of methanol, three times with 200 ml of purified water and finally with 200 ml of methanol. The obtained polymer was dissolved in 10 ml of tetrahydrofuran and dialyzed for 1 day with a dialysis film (manufactured by Spectrum Inc., Stectra/Por Standard Regenerated Cellulose Dialysis Membrane 3), in a 1-L beaker containing 500 ml of methanol. The polymer present in the dialysis film was recovered and dried under a reduced pressure to obtain 948 mg of a desired PHA.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 76000 and a weight-averaged molecular weight Mw = 235000. For specifying the structure of the obtained

PHA, a NMR analysis was carried out under conditions same as in Example 1.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-benzoylvaleric acid represented by the following chemical formula (62), 3-hydroxy-9- carboxynonanoic acid represented by a chemical formula (54), 3-hydroxy-7-carboxyheptanoic acid represented by a chemical formula (55) and 3-hydroxy- 5-carboxyvaleric acid represented by a chemical formula (56) .

30 mg of the object PHA were charged in a 100- ml eggplant-shaped flask and were dissolved by adding 2.1 ml of chloroform and 0.7 ml of methanol. The solution was added with 0.3 ml of a 2.0 mol/L hexane solution of trimethylsilyldiazomethane in hexane (supplied by Aldrich Inc.) and was agitated for 30 minutes at the room temperature. After the reaction, the solvent was distilled off in an evaporator to recover a polymer. The polymer was recovered by washing with 50 ml of methanol. A drying under a reduced pressure provided 29 mg of PHA.

A NMR analysis was carried out as in Example 1. As a result, ¹H-NMR spectrum confirmed a proportion of the units in which 3-hydroxy-5-benzoylvaleric acid was present by 84 mol%, a sum of three units of 3- hydroxy-9-carboxynonanoic acid, 3-hydroxy-7- carboxyheptanoic acid and 3-hydroxy-5-carboxyvaleric acid by 9 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 7 mol%. [Example 16] There were prepared ten 2000-ml shake flasks, and, in each, 0.5 wt . % of polypeptone (supplied by Wako Pure Chemical Co.), 6 mmol/L of 5- [ (phenylmethyl) sulfanyl] valeric acid, and 1.5 mmol/L of 10-undecenoic acid were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 10 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours, was added to each prepared culture medium, and culture was conducted for 60 hours at 30°C. After the culture, the culture liquids were united, and the cells were recovered by centrifuging, rinsed with methanol and dried. The dried cells, after weighing, were agitated with chloroform for 72 hours at 25°C to extract a polymer. The chloroform extract was filtered with a 0.45 μm membrane filter, then concentrated in an evaporator, and the polymer was recovered by a reprecipitation in cold methanol. A desired polymer was then obtained by drying under a reduced pressure. According to a weighing of the obtained polymer, 1714 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 110000 and a weight-averaged molecular weight Mw = 380000.

For specifying the structure of the obtained PHA, a NMR analysis was conducted under conditions similar to those in Example 1.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-[ (phenylmethyl) sulfanyl] aleric acid represented by the following chemical formula (63), 3-hydroxy-10-undecenoic acid represented by a chemical formula (5), 3-hydroxy-8-nonenoic acid represented by a chemical formula (6) and 3-hydroxy- 6-heptenoic acid represented by a chemical formula (7).

Also a proportion of such units was confirmed by ¹H-NMR spectrum, where a sum of three units of 3- hydroxy-10-undecenoic acid, 3-hydroxy-8-nonenoic acid and 3-hydroxy-6-heptenoic acid was present by 12 mol%, 3-hydroxy-5- [ (phenylmethyl) sulfanyl] aleric acid by 80 mol% and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 8 mol%. [Example 17]

There were prepared three 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemical Co.), 6 mmol/L of 5- (2- thienyl) valeric acid, and 1.5 mmol/L of 10-undecenoic acid were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 10 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours, was added to each prepared culture medium, and culture was conducted for 60 hours at 30°C. After the culture, the culture liquids were united, and the cells were recovered by centrifuging, rinsed with methanol and dried. The dried cells, after weighing, were agitated with chloroform for 72 hours at 25°C to extract a polymer. The chloroform extract was filtered with a 0.45 μm membrane filter, then concentrated in an evaporator, and the polymer was recovered by a reprecipitation in cold methanol. A desired polymer was then obtained by drying under a reduced pressure.

According to a weighing of the obtained polymer,

1171 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC:

Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 74000 and a weight-averaged molecular weight Mw = 180000. For specifying the structure of the obtained PHA, a NMR analysis was conducted under conditions similar to those in Example 1.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5- (2-thienyl) valeric acid represented by the following chemical formula (64), 3-hydroxy-10- undecenoic acid represented by a chemical formula (5) , 3-hydroxy-8-nonenoic acid represented by a chemical formula (6) and 3-hydroxy-6-heptenoic acid represented by a chemical formula (7).

(6)

Also a proportion of such units was confirmed by ¹H-NMR spectrum, where a sum of three units of 3- hydroxy-10-undecenoic acid, 3-hydroxy-8-nonenoic acid and 3-hydroxy-6-heptenoic acid was present by 12 mol%, 3-hydroxy-5- (2-thienyl) valeric acid by 85 mol% and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 3 mol% .

The polyhydroxy alkanoate thus obtained was utilized in the following reaction.

1001 mg of polyhydroxy alkanoate were charged in a 500-ml eggplant-shaped flask and were dissolved by adding 60 ml of dichloromethane. The solution was placed in an iced bath, and 10 ml of acetic acid and 527 mg of 18-crown-6-ether were added and agitated. Then, in an iced bath, 420 mg of potassium permanganate were slowly added and an agitation was carried out for 2 hours in an iced bath and 18 hours at the room temperature. After the reaction, 100 ml of water and 1000 mg of sodium bisulfite were added. Then the liquid was brought to pH = 1 by 1.0 N hydrochloric acid. After dichloromethane in the mixed solvent was distilled off in an evaporator, a polymer in the solution was recovered. The polymer was recovered by washing with 200 ml of purified water, then with 200 ml of methanol, three times with 200 ml of purified water and finally with 200 ml of methanol. The obtained polymer was dissolved in 10 ml of tetrahydrofuran and dialyzed for 1 day with a dialysis film (manufactured by Spectrum Inc.,

Stectra/Por Standard Regenerated Cellulose Dialysis Membrane 3) , in a 1-L beaker containing 500 ml of methanol. The polymer present in the dialysis film was recovered and dried under a reduced pressure to obtain 946 mg of a desired PHA.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 45000 and a weight-averaged molecular weight Mw = 95000. For specifying the structure of the obtained PHA, a NMR analysis was carried out under conditions same as in Example 1.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5- (2-thienyl) valeric acid represented by the following chemical formula (64), 3-hydroxy-9- carboxynonanoic acid represented by a chemical formula (54), 3-hydroxy-7-carboxyheptanoic acid represented by a chemical formula (55) and 3-hydroxy- 5-carboxyvaleric acid represented by a chemical formula (56) .

4/044213

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30 mg of the object PHA were charged in a 100- ml eggplant-shaped flask and were dissolved by adding 2.1 ml of chloroform and 0.7 ml of methanol. The solution was added with 0.3 ml of a 2.0 mol/L solution of trimethylsilyldiazomethane in hexane

(supplied by Aldrich Inc.) and was agitated for 30 minutes at the room temperature. After the reaction, the solvent was distilled off in an evaporator to recover a polymer. The polymer was recovered by washing with 50 ml of methanol. A drying under a reduced pressure provided 30 mg of PHA.

A NMR analysis was carried out as in Example 1. As a result, ¹H-NMR spectrum confirmed a proportion of the units in which 3-hydroxy-5- (2-thienyl) valeric acid was present by 85 mol%, a sum of three units of 3-hydroxy-9-carboxynonanoic acid, 3-hydroxy-7- carboxyheptanoic acid and 3-hydroxy-5-carboxyvaleric acid by 10 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 5 mol%. [Example 18]

There were prepared three 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemical Co.), 6 mmol/L of 5- (2- thienylsulfanyl) valeric acid, and 1 mmol/L of 10- undecenoic acid were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 10 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours, was added to each prepared culture medium, and culture was conducted for 60 hours at 30°C. After the culture, the culture liquids were united, and the cells were recovered by centrifuging, rinsed with methanol and dried. The dried cells, after weighing, were agitated with chloroform for 72 hours at 25°C to extract a polymer. The chloroform extract was filtered with a 0.45 μm membrane filter, then concentrated in an evaporator, and the polymer was recovered by a reprecipitation in cold methanol. A desired polymer was then obtained by drying under a reduced pressure.

According to a weighing of the obtained polymer, 1257 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 68000 and a weight-averaged molecular weight Mw = 160000. For specifying the structure of the obtained PHA, a NMR analysis was conducted under conditions same as in Example 1.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5- (2-thienylsulfanyl) valeric acid represented by the following chemical formula (65), 3-hydroxy-10- undecenoic acid represented by a chemical formula (5) 3-hydroxy-8-nonenoic acid represented by a chemical formula (6) and 3-hydroxy-6-heptenoic acid represented by a chemical formula (7) .

(5)

(6)

(7 :

Also a proportion of such units was confirmed by ^""Ή-NMR spectrum, where a sum of three units of 3- hydroxy-10-undecenoic acid, 3-hydroxy-8-nonenoic acid and 3-hydroxy-6-heptenoic acid was present by 9 mol%, 3-hydroxy-5- (2-thienylsulfanyl) valeric acid by 84 mol% and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 7 mol%. [Example 19] There were prepared ten 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemical Co.), 6 mmol/L of 5- (2- thienylcarbonyl) valeric acid, and 1 mmol/L of 10- undecenoic acid were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 10 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours, was added to each prepared culture medium, and culture was conducted for 60 hours at 30°C. After the culture, the culture liquids were united, and the cells were recovered by centrifuging, rinsed with methanol and dried. The dried cells, after weighing, were agitated with chloroform for 72 hours at 25°C to extract a polymer. The chloroform extract was filtered with a 0.45 μm membrane filter, then concentrated in an evaporator, and the polymer was recovered by a reprecipitation in cold methanol. A desired polymer was then obtained by drying under a reduced pressure.

According to a weighing of the obtained polymer, 1251 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 75000 and a weight-averaged molecular weight Mw = 180000.

For specifying the structure of the obtained PHA, a NMR analysis was conducted under conditions similar to those in Example 1. As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5- (2-thienylcarbonyl) valeric acid represented by the following chemical formula (66), 3-hydroxy-10- undecenoic acid represented by a chemical formula (5) , 3-hydroxy-8-nonenoic acid represented by a chemical formula (6) and 3-hydroxy-6-heptenoic acid represented by a chemical formula (7) .

4/044213

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(7 )

Also a proportion of such units was confirmed by ¹H-NMR spectrum, where a sum of three units of 3- hydroxy-10-undecenoic acid, 3-hydroxy-8-nonenoic acid and 3-hydroxy-6-heptenoic acid was present by 10 mol%, 3-hydroxy-5- (2-thienylcarbonyl) aleric acid by 81 mol% and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and^' 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 9 mol%.

The polyhydroxy alkanoate thus obtained was utilized in the following reaction.

999 mg of polyhydroxy alkanoate were charged in a 500-ml eggplant-shaped flask and were dissolved by adding 60 ml of dichloromethane. The solution was placed in an iced bath, and 10 ml of acetic acid and 382 mg of 18-crown-6-ether were added and agitated. Then, in an iced bath, 304 mg of potassium permanganate were slowly added and an agitation was carried out for 2 hours in an iced bath and 18 hours at the room temperature. After the reaction, 100 ml of water and 1000 mg of sodium bisulfite were added. Then the liquid was brought to pH = 1 by 1.0 N hydrochloric acid. After dichloromethane in the mixed solvent was distilled off in an evaporator, a polymer in the solution was recovered. The polymer was recovered by washing with 200 ml of purified water, then with 200 ml of methanol, three times with 200 ml of purified water and finally with 200 ml of methanol. The obtained polymer was dissolved in 10 ml of tetrahydrofuran and dialyzed for 1 day with a dialysis film (manufactured by Spectrum Inc., Stectra/Por Standard Regenerated Cellulose Dialysis Membrane 3) , in a 1-L beaker containing 500 ml of methanol. The polymer present in the dialysis film was recovered and dried under a reduced pressure to obtain 935 mg of a desired PHA.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 45000 and a weight-averaged molecular weight Mw = 99000.

For specifying the structure of the obtained PHA, a NMR analysis was carried out under conditions same as in Example 1. As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5- (2-thienylcarbonyl) valeric acid represented by the following chemical formula (66), 3-hydroxy-9- carboxynonanoic acid represented by a chemical formula (54), 3-hydroxy-7-carboxyheptanoic acid represented by a chemical formula (55) and 3-hydroxy-

5-carboxyvaleric acid represented by a chemical formula (56) .

31 mg of the object PHA were charged in a 100- ml eggplant-shaped flask and were dissolved by adding 2.1 ml of chloroform and 0.7 ml of methanol. The solution was added with 0.3 ml of a 2.0 mol/L solution of trimethylsilyldiazomethane in hexane (supplied by Aldrich Inc.) and was agitated for 30 minutes at the room temperature. After the reaction, the solvent was distilled off in an evaporator to recover a polymer. The polymer was recovered by washing with 50 ml of methanol. A drying under a reduced pressure provided 30 mg of PHA.

A NMR analysis was carried out as in Example 1. As a result, ¹H-NMR spectrum confirmed a proportion of the units in which 3-hydroxy-5- (2- thienylcarbonyl) valeric acid was present by 83 mol%, a sum of three units of 3-hydroxy-9-carboxynonanoic acid, 3-hydroxy-7-carboxyheptanoic acid and 3- hydroxy-5-carboxyvaleric acid by 7 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 10 mol%. [Example 20] There were prepared fifteen 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemical Co.), 6 mmol/L of 5- [ (phenylmethyl) oxy] valeric acid, and 1 mmol/L of 10- undecenoic acid were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature . Then 10 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours, was added to each prepared culture medium, and culture was conducted for 60 hours at 30°C. After the culture, the culture liquids were united, and the cells were recovered by centrifuging, rinsed with methanol and dried. The dried cells, after weighing, were agitated with chloroform for 72 hours at 25°C to extract a polymer. The chloroform extract was filtered with a 0.45 μm membrane filter, then concentrated in an evaporator, and the polymer was recovered by a reprecipitation in cold methanol. A desired polymer was then obtained by drying under a reduced pressure.

According to a weighing of the obtained polymer, 1348 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 79000 and a weight-averaged molecular weight Mw = 190000.

For specifying the structure of the obtained PHA, a NMR analysis was conducted under conditions similar to those -in Example 1.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5- [ (phenylmethyl) oxy] valeric acid represented by the following chemical formula (67), 3-hydroxy-10- undecenoic acid represented by a chemical formula (5), 3-hydroxy-8-nonenoic acid represented by a chemical formula (6) and 3-hydroxy-6-heptenoic acid represented by a chemical formula (7) .

Also a proportion of such units was confirmed by ¹H-NMR spectrum, where a sum of three units of 3- hydroxy-10-undecenoic acid, 3-hydroxy-8-nonenoic acid and 3-hydroxy-6-heptenoic acid was present by 10 mol%, 3-hydroxy-5- [ (phenylmethyl) oxy] valeric acid by 82 mol% and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 8 mol%. The polyhydroxy alkanoate thus obtained was utilized in the following reaction.

1004 mg of polyhydroxy alkanoate were charged in a 500-ml eggplant-shaped flask and were dissolved by adding 60 ml of dichloromethane. The solution was placed in an iced bath, and 10 ml of acetic acid and 389 mg of 18-crown-6-ether were added and agitated. Then, in an iced bath, 310 mg of potassium permanganate were slowly added and an agitation was carried out for 2 hours in an iced bath and 18 hours at the room temperature. After the reaction, 100 ml of water and 1000 mg of sodium bisulfite were added. Then the liquid was brought to pH = 1 by 1.0 N hydrochloric acid. After dichloromethane in the mixed solvent was distilled off in an evaporator, a polymer in the solution was recovered. The polymer was recovered by washing with 200 ml of purified water, then with 200 ml of methanol, three times with 200 ml of purified water and finally with 200 ml of methanol. The obtained polymer was dissolved in 10 ml of tetrahydrofuran and dialyzed for 1 day with a dialysis film (manufactured by Spectrum Inc., Stectra/Por Standard Regenerated Cellulose Dialysis Membrane 3) , in a 1-L beaker containing 500 ml of methanol. The polymer present in the dialysis film was recovered and dried under a reduced pressure to obtain 940 mg of a desired PHA. An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 48000 and a weight-averaged molecular weight Mw = 106000.

For specifying the structure of the obtained PHA, a NMR analysis was carried out under conditions same as in Example 1. As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5- [ (phenylmethyl) oxy] valeric acid represented by the following chemical formula (67), 3-hydroxy-9- carboxynonanoic acid represented by a chemical formula (54), 3-hydroxy-7-carboxyheptanoic acid represented by a chemical formula (55) and 3-hydroxy- 5-carboxyvaleric acid represented by a chemical formula (56) .

(supplied by Aldrich Inc.) and was agitated for 30 minutes at the room temperature. After the reaction, the solvent was distilled off in an evaporator to recover a polymer. The polymer was recovered by washing with 50 ml of methanol. A drying under a reduced pressure provided 29 mg of PHA.

A NMR analysis was carried out as in Example 1. As a result, ¹H-NMR spectrum confirmed a proportion of the units in which 3-hydroxy-5- [ (phenylmethyl) oxy] valeric acid was present by 84 mol%, a sum of three units of 3-hydroxy-9-carboxynonanoic acid, 3-hydroxy- 7-carboxyheptanoic acid and 3-hydroxy-5- carboxyvaleric acid by 8 mol%, and others (linear 3- hydroxyalkanoic acid of 4 to 12 carbon atoms and 3- hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 8 mol%.

[Example 21] There were prepared five 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemical Co.), 3 mmol/L of 5-phenoxyvaleric acid, 3 mmol/L of 5-cyclohexylvaleric acid and 1 mmol/L of 10-undecenoic. acid were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 10 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours, was added to each prepared culture medium, and culture was conducted for 60 hours at 30°C. After the culture, the culture liquids were united, and the cells were recovered by centrifuging, rinsed with methanol and dried. The dried cells, after weighing, were agitated with chloroform for 72 hours at 25°C to extract a polymer. The chloroform extract was filtered with a 0.45 μm membrane filter, then concentrated in an evaporator, and the polymer was recovered by a reprecipitation in cold methanol. A desired polymer was then obtained by drying under a reduced pressure. , ,„„ ._ 4/044213

- 115

According to a weighing of the obtained polymer, 1285 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 86000 and a weight-averaged molecular weight Mw = 230000.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-phenoxyvaleric acid represented by the following chemical formula (53), 3-hydroxy-5- cyclohexylvaleric acid represented by the following chemical formula (68), 3-hydroxy-10-undecenoic acid represented by a chemical formula (5) , 3-hydroxy-8- nonenoic acid represented by a chemical formula (6) and 3-hydroxy-6-heptenoic acid represented by a chemical formula (7) .

(6)

Also a proportion of such units was confirmed by ¹H-NMR spectrum, where a sum of three units of 3- hydroxy-10-undecenoic acid, 3-hydroxy-8-nonenoic acid and 3-hydroxy-6-heptenoic acid was present by 7 mol%, 3-hydroxy-5-phenoxyvaleric acid by 48 mol%, 3- hydroxy-5-cyclohexylvaleric acid by 41 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 4 mol%.

The polyhydroxy alkanoate thus obtained was utilized in the following reaction.

1002 mg of polyhydroxy alkanoate were charged in a 500-ml eggplant-shaped flask and were dissolved by adding 60 ml of dichloromethane. The solution was placed in an iced bath, and 10 ml of acetic acid and 288 mg of 18-crown-6-ether were added and agitated. Then, in an iced bath, 230 mg of potassium permanganate were slowly added and an agitation was carried out for 2 hours in an iced bath and 18 hours at the room temperature. After the reaction, 100 ml of water and 1000 mg of sodium bisulfite were added. Then the liquid was brought to pH = 1 by 1.0 N hydrochloric acid. After dichloromethane in the mixed solvent was distilled off in an evaporator, a polymer in the solution was recovered. The polymer was recovered by washing with 200 ml of purified water, then with 200 ml of methanol, three times with 200 ml of purified water and finally with 200 ml of methanol. The obtained polymer was dissolved in 10 ml of tetrahydrofuran and dialyzed for 1 day with a dialysis film (manufactured by Spectrum Inc.,

Stectra/Por Standard Regenerated Cellulose Dialysis Membrane 3), in a 1-L beaker containing 500 ml of methanol. The polymer present in the dialysis film was recovered and dried under a reduced pressure to obtain 967 mg of a desired PHA.

An average molecular weight of the- obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 51000 and a weight-averaged molecular weight Mw = 108000.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-phenoxyvaleric acid represented by the following chemical formula (53) , 3-hydroxy-5- cyclohexylvaleric acid represented by the following chemical formula (68), 3-hydroxy-9-carboxynonanoic acid represented by a chemical formula (54), 3- hydroxy-7-carboxyheptanoic acid represented by a chemical formula (55) and 3-hydroxy-5-carboxyvaleric acid represented by a chemical formula (56) .

Also a proportion of the units of the obtained • PHA was calculated by a methylesterification, utilizing trimethylsilyldiazomethane, of a carboxyl group at an end of a side chain of the PHA.

30 mg of the object PHA were charged in a 100- ml eggplant-shaped flask and were dissolved by adding 2.1 ml of chloroform and 0.7 ml of methanol. The solution was added with 0.3 ml of a 2.0 mol/L solution of trimethylsilyldiazomethane in hexane (supplied by Aldrich Inc.) and was agitated for 30 minutes at the room temperature. After the reaction, the solvent was distilled off in an evaporator to recover a polymer. The polymer was recovered by washing with 50 ml of methanol. A drying under a reduced pressure provided 28 mg of PHA.

A NMR analysis was carried out as in Example 1. As a result, ^''^"H-NMR spectrum confirmed a proportion , _{Λ Λ} „ 4/044213

121 -

of the units in which 3-hydroxy-5-phenoxyvaleric acid was present by 49 mol%, 3-hydroxy-5-cyclohexyl aleric acid by 42 mol%, a sum of three units of 3-hydroxy-9- carboxynonanoic acid, 3-hydroxy-7-carboxyheptanoic acid and 3-hydroxy-5-carboxyvaleric acid by 6 moll, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 3 mol%. [Example 22] There were prepared two 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemical Co.), 4 mmol/L of 5-phenylvaleric acid, and 1 mmol/L of dodecanedioic acid monoethyl ester were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature . Then 5 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to each prepared culture medium, and culture was conducted for 41 hours at 30°C. After the culture, the cells were recovered by centrifuging, rinsed with methanol and lyophilized. The dried cells, after weighing, were agitated with chloroform for 48 hours at 50°C to extract a polymer. The chloroform extract was filtered, then concentrated in 4/044213

- 122 -

an evaporator, and a solid precipitate formed with cold methanol was collected and dried under a reduced pressure to obtain a desired polymer. According to a weighing of the obtained polymer, 910 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 78000 and a weight-averaged molecular weight Mw = 157000.

For specifying the structure of the obtained PHA, a NMR analysis was conducted under same conditions as in Example 1.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-phenylvaleric acid represented by the following chemical formula (60) by 78 mol%, three units of 3-hydroxy-ll-ethoxycarbonylundecanoic acid represented by the following chemical formula (69), 3-hydroxy-9-ethoxycarbonylnonanoic acid represented by a chemical formula (70), and 3-hydroxy-7- ethoxycarbonylheptanoic acid represented by a chemical formula (71) collectively by 14 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to '12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or carbon atoms) by 8 mol%

[Example 23]

There were prepared two 2000-ml shake flasks, and, in each, 0.5 wt.% of yeast extract (supplied by DIFCO) , 4 mmol/L of 5-phenylvaleric acid, and 1 mmol/L of dodecanedioic acid monoethyl ester were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 5 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to each prepared culture medium, and culture was conducted for 40 hours at 30°C. After the culture, the cells were recovered by centrifuging, rinsed with methanol and lyophilized. The dried cells, after weighing, were agitated with chloroform for 48 hours at 50°C to extract a polymer. The chloroform extract was filtered, then concentrated in an evaporator, and a solid precipitate formed with cold methanol was collected and dried under a reduced pressure to obtain a desired polymer. According to a weighing of the obtained polymer, 250 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 75000 and a weight-averaged molecular weight Mw = 152000.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-phenyl aleric acid represented by the following chemical formula (60) by 75 mol%, three units of 3-hydroxy-ll-ethoxycarbonylundecanoic acid represented by the following chemical formula (69), 3-hydroxy-9-ethoxycarbonylnonanoic acid represented by a chemical formula (70) , and 3-hydroxy-7- ethoxycarbonylheptanoic acid represented by a chemical formula (71) collectively by 15 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or carbon atoms) by 10 mol'

[Example 24]

There were prepared two 2000-ml shake flasks, and, in each, 0.5 wt.% of D-glucose (supplied by Kishida Kagaku) , 4 mmol/L of 5-phenylvaleric acid, and 1 mmol/L of dodecanedioic acid monoethyl ester were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 5 ml of a culture liquid of Pseudomonas jessenii P161 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to each prepared culture medium, and culture was conducted for 40 hours at 30°C. After the culture, the cells were recovered by centrifuging, rinsed with methanol and lyophilized. The dried cells, after weighing, were agitated with chloroform for 48 hours at 50°C to extract a polymer. The chloroform extract was filtered, then concentrated in an evaporator, and a 4/044213

- 128 -

solid precipitate formed with cold methanol was collected and dried under a reduced pressure to obtain a desired polymer. According to a weighing of the obtained polymer, 300 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 71000 and a weight-averaged molecular weight Mw = 149000.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-phenylvaleric acid represented by the following chemical formula (60) by 78 mol%, three units of 3-hydroxy-ll-ethoxycarbonylundecanoic acid represented by the following chemical formula (69), 3-hydroxy-9-ethoxycarbonylnonanoic acid represented by a chemical formula (70) , and 3-hydroxy-7- ethoxycarbonylheptanoic acid represented by a chemical formula (71) collectively by 14 mol%, and others (linear 3-hydroxyalkanoic acid, of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or carbon atoms) by 8 mol%

(69)

[Example 25]

There were prepared two 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemicals Co.), 4 mmol/L of 5- phenoxyvaleric acid, and 1 mmol/L of dodecanedioic acid monoethyl ester were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 5 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to each prepared culture medium, and culture was conducted for 41 hours at 30°C. After the culture, the cells were recovered by centrifuging, rinsed with methanol and lyophilized. The dried cells, after weighing, were agitated with chloroform for 48 hours at 50°C to extract a polymer. The chloroform extract was filtered, then concentrated in an evaporator, and a solid precipitate formed with cold methanol was collected and dried under a reduced pressure to obtain a desired polymer. According to a weighing of the obtained polymer, 680 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 69000 and a weight-averaged molecular weight Mw = 135000.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-phenoxyvaleric acid represented by the following chemical formula (53) by 74 mol%, three units of 3-hydroxy-11-ethoxycarbonylundecanoic acid represented by the following chemical formula (69), 3-hydroxy-9-ethoxycarbonylnonanoic acid represented by a chemical formula (70) , and 3-hydroxy-7- ethoxycarbonylheptanoic acid represented by a chemical formula (71) collectively by 17 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or carbon atoms) by 9 mol%

[Example 26]

There were prepared two 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemicals Co.), 4 mmol/L of 4- cyclohexylbutyric acid, and 1 mmol/L of dodecanedioic acid monoethyl ester were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 5 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to each prepared culture medium, and culture was conducted for 41 hours at 30°C. After the culture, the cells were recovered by centrifuging, rinsed with methanol and lyophilized. The dried cells, after weighing, were agitated with chloroform for 48 hours at 50°C to extract a polymer. The chloroform extract was filtered, then concentrated in an evaporator, and a solid precipitate formed with cold methanol was collected and dried under a reduced pressure to obtain a desired polymer. According to a weighing of the obtained polymer, 720 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 81000 and a weight-averaged molecular weight Mw = 160000.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-4-cyclohexylbutyric acid represented by the following chemical formula (57) by 76 mol%, three units of 3-hydroxy-ll-ethoxycarbonylundecanoic acid represented by the following chemical formula (69), 3-hydroxy-9-ethoxycarbonylnonanoic acid represented by a chemical formula (70), and 3-hydroxy-7- ethoxycarbonylheptanoic acid represented by a chemical formula (71) collectively by 16 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 135

carbon atoms) by 8 mol%

[Example 27]

There were prepared two 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemicals Co.), 4 mmol/L of 5-

(phenylsulfanyl) aleric acid, and 1 mmol/L of dodecanedioic acid monoethyl ester were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature.

Then 5 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to each prepared culture medium, and culture was conducted for 42 hours at

30°C. After the culture, the cells were recovered by centrifuging, rinsed with methanol and lyophilized. The dried cells, after weighing, were agitated with chloroform for 48 hours at 50°C to extract a polymer. The chloroform extract was filtered, then concentrated in an evaporator, and a solid precipitate formed with cold methanol was collected and dried under a reduced pressure to obtain a desired polymer. According to a weighing of the obtained polymer, 890 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 84000 and a weight-averaged molecular weight Mw = 169000.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5- (phenylsulfanyl) valeric acid represented by the following chemical formula (58) by 80 mol%, three units of 3-hydroxy-ll-ethoxycarbonylundecanoic acid represented by the following chemical formula (69), 3-hydroxy-9-ethoxycarbonylnonanoic acid represented by a chemical formula (70), and 3-hydroxy-7- ethoxycarbonylheptanoic acid represented by a chemical formula (71) collectively by 14 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms ) by 6 mol% .

139 -

[Example 28]

There were prepared two 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemicals Co.), 4 mmol/L of 5- benzoylvaleric acid, and 1 mmol/L of dodecanedioic acid monoethyl ester were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 5 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to each prepared culture medium, and culture was conducted for 41 hours at 30°C. After the culture, the cells were recovered by centrifuging, rinsed with methanol and lyophilized. The dried cells, after weighing, were agitated with chloroform for 48 hours 'at 50°C to extract a polymer. The chloroform extract was filtered, then concentrated in an evaporator, and a solid precipitate formed with cold methanol was collected and dried under a reduced pressure to obtain a desired polymer. According to a weighing of the obtained polymer, 450 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 156000 and a weight-averaged molecular weight Mw = 325000.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-benzoylvaleric acid represented by the following chemical formula (62) by 69 mol%, three units of 3-hydroxy-11-ethoxycarbonylundecanoic acid represented by the following chemical formula (69), 3-hydroxy-9-ethoxycarbonylnonanoic acid represented by a chemical formula (70) , and 3-hydroxy-7- ethoxycarbonylheptanoic acid represented by a chemical formula (71) collectively by 18 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or carbon atoms) by 13 mol'

[Example 29]

There were prepared two 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemicals Co.), 4 mmol/L of 5- (4- cyanophenoxy) valeric acid, and 1 mmol/L of sebacic acid monomethyl ester were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 5 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to each prepared culture medium, and culture was conducted for 41 hours at 30°C. After the culture, the cells were recovered by centrifuging, rinsed with methanol and lyophilized. The dried cells, after weighing, were agitated with chloroform for 48 hours at 50°C to extract a polymer. The chloroform extract was filtered, then concentrated in an evaporator, and a solid precipitate formed with cold methanol was collected and dried under a reduced pressure to obtain a desired polymer. According to a weighing of the obtained polymer, 450 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 68000 and a weight-averaged molecular weight Mw = 129000.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5- (4-cyanophenoxy) aleric acid represented by the following chemical formula (72) by 34 mol%, two units of 3-hydroxy-9-methoxycarbonylnonanoic acid represented by the following chemical formula (73) and 3-hydroxy-7-methoxycarbonylheptanoic acid represented by a chemical formula (74) collectively by 16 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 50 mol%.

CN (72)

[Example 30] There were prepared two 2000-ml shake flasks, and, in each, 0.1 wt.% of n-nonanoic acid (supplied 4/044213

- 145 -

by Kishida Kagaku) , 4 mmol/L of 5- (4- nitrophenyl) valeric acid, and 1 mmol/L of sebacic acid monomethyl ester were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 5 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to each prepared culture medium, and culture was conducted for 72 hours at 30°C. After the culture, the cells were recovered by centrifuging, rinsed with methanol and lyophilized. The dried cells, after weighing, were agitated with chloroform for 48- hours at 50°C to extract a polymer. The chloroform extract was filtered, then concentrated in an evaporator, and a solid precipitate formed with cold methanol was collected and dried under a reduced pressure to obtain a desired polymer. According to a weighing of the obtained polymer, 170 mg (dry weight) of PHA were obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 59000 and a weight-averaged molecular weight Mw = 125000.

For specifying the structure of the obtained PHA, a NMR analysis was conducted under same conditions as in Example 1. As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5- (4-nitrophenyl) valeric acid represented by the following chemical formula (75) by 8 mol%, two units of 3-hydroxy-9-methoxycarbonylnonanoic acid represented by the following chemical formula (73) and 3-hydroxy-7-methoxycarbonylheptanoic acid represented by a chemical formula (74) collectively by 18 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 74 mol%.

[Example 31]

There were prepared two 2000-ml shake flasks, and, in each, 0.1 wt.% of n-nonanoic acid (supplied by Kishida Kagaku) , 4 mmol/L of 5- [ (phenylmethyl) oxy] valeric acid, and 1 mmol/L of sebacic acid monomethyl ester were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 5 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to each prepared culture medium, and culture was conducted for 40 hours at 30°C. After the culture, the cells were recovered by centrifuging, rinsed with methanol and lyophilized. The dried cells, after weighing, were agitated with chloroform for 48 hours at 50°C to extract a polymer. The chloroform extract was filtered, then concentrated in an evaporator, and a solid precipitate formed with cold methanol was collected and dried under a reduced pressure to obtain a desired polymer. According to a weighing of the obtained polymer, 330 mg (dry weight) of PHA were obtained in the present example. An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 79000 and a weight-averaged molecular weight Mw = 152000.

For specifying the structure of the obtained PHA, a NMR analysis was conducted under same conditions as in Example 1. As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5- [ (phenylmethyl) oxy] aleric acid represented by the following chemical formula (68) by 81 mol%, two units of 3-hydroxy-9-methoxycarbonylnonanoic acid represented by the following chemical formula (73) and 3-hydroxy-7-methoxycarbonylheptanoic acid represented by a chemical formula (74) collectively by 13 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 6 mol%.

[Example 32]

There were prepared two 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemical Co.), 4 mmol/L of 5-5- phenylvaleric acid, and 1 mmol/L of sebacic acid monomethyl ester were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 5 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to each prepared culture medium, and culture was conducted for 40 hours at 30°C. After the culture, the cells were recovered by centrifuging, rinsed with methanol and lyophilized. The dried cells, after weighing, were agitated with chloroform for 48 hours at 50°C to extract a polymer. The chloroform extract was filtered, then concentrated in , ,„„ ._ 04/044213

- 151 -

an evaporator, and a solid precipitate formed with cold methanol was collected and dried under a reduced pressure to obtain a desired polymer. According to a

» weighing of the obtained polymer, 1340 mg (dry weight) of PHA were obtained in the present example. An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 81000 and a weight-averaged molecular weight Mw = 159000.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-phenylvaleric acid represented by the following chemical formula (60) by 77 mol%, two units of 3-hydroxy-9-methoxycarbonylnonanoic acid represented by the following chemical formula (73) and 3-hydroxy-7-methoxycarbonylheptanoic acid represented by a chemical formula (74) collectively by 19 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 4 mol%.

The polyhydroxy alkanoate thus obtained was utilized in the following reaction.

The synthesized polyhydroxy alkanoate was formed into a film, and 500 mg of such film was placed on a Petri dish and was let to stand for 5 hours in 100 ml of a 0. IN aqueous solution of sodium hydroxide. After the reaction, the sodium hydroxide solution was removed, and the polymer was washed three times with 100 ml of distilled water. Then the polymer was dissolved in 200 ml of ethyl acetate, and, after an addition of 100 ml of a 1. ON aqueous solution of hydrochloric acid, the solution was agitated for 1 hour at the room temperature. Then the polymer was extracted, washed with distilled water and the solvent was distilled off to recover the polymer. Thereafter, a drying under a reduced pressure was carried out to obtain 350 mg of a desired polymer.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 9500 and a weight-averaged molecular weight Mw = 32000.

For specifying the structure of the obtained PHA,. a NMR analysis was conducted under same conditions as in Example 1.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-phenylvaleric acid represented by the following chemical formula (60), 3-hydroxy-9- carboxynonanoic acid represented by the following chemical formula (54) and 3-hydroxy-7- carboxyheptanoic acid represented by a chemical formula (55) .

Also a proportion of the units in the obtained polymer was calculated from a decrease in ester groups, and confirmed as 3-hydroxy-5-phenylvaleric acid by 78 mol%, 3-hydroxy-9-carboxylnonanoic acid and 3-hydroxy-7-carboxylheptanoic acid collectively by 12 mol%, 3-hydroxy-9-methoxycarbonylnonanoic acid and 3-hydroxy-7-methoxycarbonylheptanoic acid collectively by 6 mol%, and others (linear 3- hydroxyalkanoic acid of 4 to 12 carbon atoms and 3- hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 4 mol%. [Example 33]

There were prepared two 2000-ml shake flasks, and, in each, 0.5 wt.% of polypeptone (supplied by Wako Pure Chemical Co.), 4 mmol/L of 5-phenoxyvaleric acid, and 1 mmol/L of sebacic acid monomethyl ester were dissolved in 1000 ml of an aforementioned M9 culture medium, which was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 5 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to each prepared culture medium, and culture was conducted for 40 hours at 30°C. After the culture, the cells were recovered by centrifuging, rinsed with methanol and lyophilized. The dried cells, after weighing, were agitated with chloroform for 48 hours at 50°C to extract a polymer. The chloroform extract was filtered, then concentrated in an evaporator, and a solid precipitate formed with cold methanol was collected and dried under a reduced pressure to obtain a desired polymer. According to a weighing of the obtained polymer, 710 mg (dry weight) of PHA were 4/044213

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obtained in the present example.

An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . As a result there were obtained a number-averaged molecular weight Mn = 71000 and a weight-averaged molecular weight Mw = 148000.

As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-phenoxyvaleric acid represented by the following chemical formula (53) by 74 mol%, two units of 3-hydroxy-9-methoxycarbonylnonanoic acid represented by the following chemical formula (73) and 3-hydroxy-7-methoxycarbonylheptanoic acid represented by a chemical formula (74) collectively by 18 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 8 mol%.

The polyhydroxy alkanoate thus obtained was utilized in the following reaction.

The synthesized polyhydroxy alkanoate was formed into a film, and 500 mg of such film was placed on a Petri dish and was let to stand for 5 hours in 100 ml of a 0.1N aqueous solution of sodium hydroxide. After the reaction, the sodium hydroxide solution was removed, and the polymer was washed three times with 100 ml of distilled water. Then the polymer was dissolved in 200 ml of ethyl acetate, and, after an addition of 100 ml of a 1. ON aqueous solution of hydrochloric acid, the solution was agitated for 1 hour at the room temperature . Then the polymer was extracted, washed with distilled water and the solvent was distilled off to recover the polymer. Thereafter, a drying under a reduced pressure was carried out to obtain 370 mg of a desired polymer. An average molecular weight of the obtained PHA was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene). As a result there were obtained a number-averaged molecular weight Mn = 8700 and a weight-averaged molecular weight Mw = 30900.

For specifying the structure of the obtained PHA, a NMR analysis was conducted under same conditions as in Example 1. As a result, there was confirmed a polyhydroxy alkanoate copolymer including, as monomer units, 3- hydroxy-5-phenoxyvaleric acid represented by the following chemical formula (53), 3-hydroxy-9- carboxynonanoic acid represented by the following chemical formula (54) and 3-hydroxy-7- carboxyheptanoic acid represented by a chemical formula (55) .

Also a proportion of the units in the obtained polymer was calculated from a decrease in ester groups, and confirmed as 3-hydroxy-5-phenoxyvaleric acid by 73 mol%, 3-hydroxy-9-carboxynόnanoic acid and 3-hydroxy-7-carboxyheptanoic acid collectively by 10 mol%, 3-hydroxy-9-methoxycarbonylnonanoic acid and 3- hydroxy-7-methoxycarbonylheptanoic acid collectively by 8 mol%, and others (linear 3-hydroxyalkanoic acid of 4 to 12 carbon atoms and 3-hydroxyalk-5-enoic acid with 10 or 12 carbon atoms) by 9 mol%. [Example 34]

In 1000 mL of an aforementioned M9 culture medium, there were added 0.5 wt.% of polypeptone (supplied by Wako Pure Chemical Co.), and 5- phenylvaleric acid and sebacic acid monomethyl ester so as to obtain final concentrations of 4 and 1 mmol/L respectively, and the solution was placed in a 2000 ml shake flask, then sterilized in an autoclave and cooled to the room temperature. Then 5 ml of a culture liquid of Pseudomonas cichorii YN2 strain, shake cultured in advance in an M9 culture medium containing 0.5% of polypeptone for 8 hours at 30°C, was added to each prepared culture medium, and culture was conducted for 40 hours at 30°C. After the culture, the cells were recovered by centrifuging, rinsed with methanol and lyophilized. The dried cells, after weighing, were agitated with chloroform for 48 hours at 50°C to extract a polymer. The chloroform extract was filtered, then concentrated in an evaporator, and a solid precipitate formed with cold methanol was collected and dried under a reduced pressure to obtain a desired polymer.

A structure determination of the obtained polymer was carried out by a methynolysis-GC/MS method to be explained in the following. 5 mg of the polymer were dissolved in 2 mL of chloroform, then added with 2 mL of a 3% methanol solution of sulfuric acid and refluxed for 3.5 hours at 100°C. After the reaction, the reaction mixture was cooled to the room temperature and separated by adding 10 mL of deionized water under agitation. Then an organic layer was dehydrated with magnesium sulfate (anhydrous) and the reaction liquid was subjected to a measurement by a gas chromatography-mass spectrometer (GC/MS: Shimadzu QP-5050A, column: DB- WAXETR 0.32 mm x 30 m). An obtained total ion chromatogram (TIC) is shown in Fig. 5. There were observed three main peaks at 35.6, 38.0 and 45.8 minutes. A mass spectrum (MS) of the peak at 35.6 minutes is shown in Fig. 6; a MS of the peak at 38.0 minutes is shown in Fig. 7/ and a MS of the peak at 45.8 minutes is shown in Fig. 8.

As a result, the peak at 35.6 minutes was derived from a unit shown in a chemical formula (80) :

(80) the peak at 38.0 minutes was derived from a unit shown in a chemical formula (81) :

(81) and the peak at 35.6 minutes was derived from a unit shown in a chemical formula (82) : 4/044213

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(82)

Also proportions of the units, calculated from ratios of the peak areas of TIC, were 12.0%, 77.7% and 6.7% respectively.

The molecular weight of the polymer was measured by gel permeation chromatography (GPC: Toso HLC-8220 GPC, column: Toso TSK-GEL Super HM-H, solvent: chloroform, converted to polystyrene) . Table 1 shows weights of the obtained cells and the obtained polymer, a polymer weight ratio per cell, The molecular weight and The molecular weight distribution- of the obtained polymer.

Table 1

CDW: cell dry weight, PDW: polymer dry weight, P/C: cell dry weight/polymer dry weight, Mn: number- averaged molecular weight, ' Mw: weight-averaged molecular weight, Mw/Mn: molecular weight distribution.

[Example 35]

A desired polymer was obtained in the same manner as in Example 34, except that the YN2 strain employed in Example 34 was replaced by Pseudomonas jessenii P161 strain.

A structure determination of the obtained polymer carried out by a methanolysis-GC/MS method as in Example 34 confirmed that the polymer was a polyhydroxy alkanoate copolymer constituted of units represented by chemical formulas (80), (81) and (82): chemical formula (80) :

(80)

chemical formula (81)

(81) chemical formula ( 82 ) :

(82) and the proportions of the units, calculated from the ratios of the peak areas of TIC, were 15.5%, 75.2% and 9.3% respectively.

The molecular weight of the polymer was measured by gel permeation chromatography as in Example 34.

Table 2 shows weights of the obtained cells and the obtained polymer, a polymer weight ratio per cell, the molecular weight and the molecular weight distribution of the obtained polymer. Table 2

CDW: cell dry weight, PDW: polymer dry weight,

P/C: cell dry weight/polymer dry weight, Mn: number- averaged molecular weight, Mw: weight-averaged molecular weight, Mw/Mn: molecular weight distribution. [Example 36]

A desired polymer was obtained in the same manner as in Example 34, except that the YN2 strain employed in Example 34 was replaced by Pseudomonas cichorii H45 strain and polypeptone was replaced by yeast extract (DIFCO) .

chemical formula (81)

chemical formula (82)

(82: and the proportions of the units calculated from the ratios of the peak areas of TIC were 16.1%, 72.3% and 11.6% respectively.

Table 3 shows weights of the obtained cells and the obtained polymer, polymer weight ratio per cell, the molecular weight and the molecular weight distribution of the obtained polymer.

Table 3

CDW: cell dry weight, PDW: polymer dry weight, P/C: cell dry weight/polymer dry weight, Mn: number- averaged molecular weight, Mw: weight-averaged molecular weight, Mw/Mn: molecular weight distribution.

[Example 37]

A desired polymer was obtained in the same manner as in Example 34, except that the YN2 strain employed in Example 34 was replaced by Pseudomonas ^■putida P91 strain and polypeptone was replaced by n- nonanoic acid (Kishida Kagaku, concentration: 0.1%).

A structure determination of the obtained polymer carried out by a methanolysis-GC/MS method as in Example 34 confirmed that the polymer was a polyhydroxy alkanoate copolymer constituted of units represented by chemical formulas (80), (81), (82), (83), (84) and (85) : chemical formula (80) :

(80) chemical formula (81):

(81) chemical formula (82)

(82) chemical formula (83)

(83) chemical formula (84) :

(84) chemical formula (85)

(85) and the proportions of the units calculated from the ratios of the peak areas of TIC were 5.1%, 52.1%, 6.6%, 11.3%, 4.9% and 20.0% respectively.

Table 4 shows weights of the obtained cells and the obtained polymer, a polymer weight ratio per cell, a molecular weight and a molecular weight distribution of the obtained polymer.

Table 4

CDW: cell dry weight, PDW: polymer dry weight, P/C: cell dry weight/polymer dry weight, Mn: number- averaged molecular weight, Mw: weight-averaged molecular weight, Mw/Mn: molecular weight distribution. [Example 38] A desired polymer was obtained in the same manner as in Example 34, except that polypeptone was replaced by D-glucose (Kishida Kagaku) .

A structure determination of the obtained polymer carried out by a methanolysis-GC/MS method as in Example 34 confirmed that the polymer was a polyhydroxy alkanoate copolymer constituted of units represented by chemical formulas (80), (81) and (82) : chemical formula (80) :

chemical formula ( 81 :

( 8i : chemical formula ( 82 )

(82) and the proportions of the units calculated from the ratios of the peak areas of TIC were 13.1%, 80.3% and 6.6% respectively.

Table 5 shows weights of the obtained cells and the obtained polymer, a polymer weight ratio per cell, a molecular weight and a molecular weight distribution of the obtained polymer.

Table 5

CDW: cell dry weight, PDW: polymer dry weight, P/C: cell dry weight/polymer dry weight, Mn: number- averaged molecular weight, Mw: weight-averaged molecular weight, Mw/Mn: molecular weight distribution. [Example 39]

A desired polymer was obtained in the same manner as in Example 34, except that polypeptone was replaced by sodium piruvate (Kishida Kagaku) .

A structure determination of the obtained polymer carried out by a^' methanolysis-GC/MS method as in Example 34 confirmed that the polymer was a polyhydroxy alkanoate copolymer constituted of units represented by chemical formulas (80), (81) and (82): chemical formula (80) :

chemical formula (81) :

chemical formula (82)

(82) and the proportions of the units calculated from the ratios of the peak areas of TIC were 11.9%, 82.2%- and 5.9% respectively.

Table 6 shows weights of the obtained cells and the obtained polymer, a polymer weight ratio per cell, a molecular weight and a molecular weight distribution of the obtained polymer.

Table 6

[Example 40]

A desired polymer was obtained in the same manner as in Example 34, except that polypeptone employed in Example 34 was replaced by sodium L- glutamate (Kishida Kagaku) and sebacic acid monomethyl ester, which is one of substrates for polymer synthesis was replaced by suberic acid monomethyl ester.

A structure determination of the obtained polymer carried out by a methanolysis-GC/MS method as in Example 34 confirmed that the polymer was a polyhydroxy alkanoate copolymer constituted of units represented by chemical formulas (86), (80) and (81): chemical formula (86) :

(86) chemical formula (80)

(80) chemical formula (81)

(81) and the proportions of the units calculated from the ratios of the peak areas of TIC were 8.2%, 84.2% and 8.6% respectively.

The molecular weight of the polymer was measured by gel permeation chromatography as in Example 34. Table 7 shows weights of the obtained cells and the obtained polymer, a polymer weight ratio per cell, a molecular weight and a molecular weight distribution of the obtained polymer.

Table 7

Claims

CLAIMS 1. A polyhydroxy alkanoate copolymer characterized in including at least a 3-hydroxy-ω- alkenoic acid unit represented by a chemical formula (1) in a molecule, and simultaneously at least a 3- hydroxy-ω-alkanoic acid unit represented by a chemical formula (2) or a 3-hydroxy-ω- cyclohexylalkanoic acid unit represented by a chemical formula (3) in the molecule: [Chemical Formula (1)]

in which n represents an integer selected within a range indicated in the chemical formula; and in case plural units are present, n is the same or different for each unit; [Chemical Formula (2)]

in which m represents an integer selected within a range indicated in the chemical formula; R represents a residue having any of a phenyl structure or a thienyl structure; and in case plural units are present, m and R are the same or different for each unit;

[Chemical Formula (3)]

in which Ri being a substituent on a cyclohexyl group represents a hydrogen atom, a CN group, a N0₂ group, a halogen atom, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; k represents an integer selected within a range indicated in the chemical formula; and in case plural units are present, Ri and k may be the same or different for each unit.

2. The polyhydroxy alkanoate copolymer according to claim 1, wherein R in the chemical formula (2) represents a residue having a phenyl structure or a thienyl structure selected from the group consisting of chemical formulas (8), (9), (10), (11), (12), (13), (14), (15), (16), (17) and (18): the chemical formula (8) :

represents a group of non-substituted or substituted phenyl groups in which R₂ , a substituent on an aromatic ring and represents an H atom, represents a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CH=CH₂ group, a COOR₃ group (R₃ represents an H atom, a Na atom or a K atom) , a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and in case plural units are present, R₂ is the same or different for each unit; the chemical formula (9) :

represents a group of non-substituted or substituted phenoxy groups in which R represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a SCH₃ group, a CF₃ group, a C₂F₅ group,, or a C₃F group; and in case plural units are present, R₄ may be the same or different for each unit; the chemical formula (10) :

represents a group of non-substituted or substituted • benzoyl groups in which R₅ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H group, a CF₃ group, a C₂Fs group, or a C₃F₇ group; and in case plural units are present, R₅ may be the same or different for each unit; the chemical formula (11)

represents a group of substituted or non-substituted phenylsulfanyl groups in which R₆ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COOR group, a S0₂R₈ group (R₇ represents either one of H, Na, K, CH₃ and C2H5; and R₈ represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R₆ may be the same or different for each unit; the chemical formula (12) :

represents a group of substituted or non-substituted (phenylmethyl) sulfanyl groups in which Rg represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COOR10 group, a S0₂Rn group (Rio represents either one of H, Na, K, CH₃ and C₂H₅; and Rn represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R₉ may be the same or different for each unit; the chemical formula (13) :

represents a 2-thienyl group; the chemical formula (14:

represents a 2-thienylsulfanyl group; the chemical formula (15) :

represents a 2-thienylcarbonyl group; the chemical formula (16) :

represents a group of substituted or non-substituted phenylsulfinyl groups in which R₁₂ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COORι₃ group, a S0₂Rι group (R_i3 represents either one of H, Na, K, CH₃ and C₂H₅; and R₁₄ represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, Rι₂ may be the same or different for each unit; the chemical formula (17) :

represents a group of substituted or non-substituted phenylsulfonyl groups in which R₁₅ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a

COORi₆ group, a S0₂Rι group (Ri6 represents either one of H, Na, K, CH₃ and C₂H₅; and R_i7 represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, Rι₅ may be the same or different for each unit; and the chemical formula (18):

represents a (phenylmethyl) oxy group.

3. The polyhydroxy alkanoate copolymer according to claim 1, wherein a number-averaged molecular weight is within a range from 1000 to 1000000.

4. A polyhydroxy alkanoate copolymer characterized in including at least a 3-hydroxy-co- carboxyalkanoic acid unit represented by a chemical formula (19) or 3-hydroxy-ω-alkoxycarbonylalkanoic acid unit represented by a chemical formula (32) in a molecule, and simultaneously at least a 3-hydroxy-ω- alkanoic acid unit represented by a chemical formula (2) or a 3-hydroxy-co-cyclohexylalkanoic acid unit represented by a chemical formula (3) in the molecule, [Chemical Formula (19)]

n =1-8 (19) in which n represents an integer selected within a range indicated in the chemical formula; Rι₈ represents an H atom, a Na atom or a K atom: and in case plural units are present, n and Rι₈ may be the same or different for each unit; and [Chemical Formula (32)]

n =1-8 (32) - 187 -

in which n represents an integer selected within a range indicated in the chemical formula; R₂ represents any of residues indicated in the chemical formula; and in case plural units are present, n and R₂ may be the same or different for each unit [Chemical Formula (2)]

in which m represents an integer selected within a range indicated in the chemical formula; R includes a residue having any of a phenyl structure or a thienyl structure; and in case plural units are present, m and R may be the same or different for each unit; and [Chemical Formula (3)]

in which Ri represents a substituent on a cyclohexyl group and represents an H atom, a CN group, a N0₂ group, a halogen atom, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CF₃ group, a C₂F5 group, or a C₃F₇ group; k represents an integer selected within a range indicated in the chemical formula; and in case plural units are present, Ri and k are the same or different for each unit.

5. The polyhydroxy alkanoate copolymer according to claim 4, wherein R in the chemical formula (2), represents a residue having a phenyl structure or a thienyl structure selected from chemical formulas (8), (9), (10), (11), (12), (13), (14), (15), (16), (17), and (18) : the chemical formula (8) :

represents a group of non-substituted or substituted phenyl groups in which R₂ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CH=CH₂ group, a COOR₃ group (R₃ representing an H atom, a Na atom or a K atom) , a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and in case plural units are present, R₂ is the same or different for each unit; the chemical formula (9) :

represents a group of non-substituted or substituted phenoxy groups in which R₄ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a SCH₃ group, a CF₃ group, a C₂Fs group, or a C₃F₇ group; and in case plural units are present, R is the same or different for each unit; the chemical formula (10) :

represents a group of non-substituted or substituted benzoyl groups in which R₅ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H group, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and in case plural units are present, R₅ is the same or different for each unit; the chemical formula (11) :

represents a group of substituted or non-substituted phenylsulfanyl groups in which R₆ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COOR₇ group, a S0₂Rs group (R₇ represents either one of H, Na, K, CH₃ and C₂H₅; and R₈ represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H5 group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, Re is the same or different for each unit; the chemical formula (12) :

represents a group of substituted or non-substituted (phenylmethyl) sulfanyl groups in which Rg represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a NO₂ group, a COOR₁₀ group, a S0₂Rn group (Rχ₀ represents either one of H, Na, K, CH₃ and C₂H₅; and Rn represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, Rg is the same or different for each unit; the chemical formula (13) :

represents a 2-thienyl group; the chemical formula (14)

represents a 2-thienylsulfanyl group; the chemical formula (15) :

represents a 2-thienylcarbonyl group; the chemical formula (16) :

represents a group of substituted or non-substituted phenylsulfinyl groups in which R_i2 represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0 group, a

COORχ₃ group, a S0₂Rι group (R_X3 represents either one of H, Na, K, CH₃ and CH₅; and Rχ₄ represents either one of OH, ONa, OK, a halogen atom, OCH₃ and 0C₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, Rχ₂ is the same or different for each unit; the chemical formula (17) :

COORi₆ group, a Sθ2Rι group (Rι₆ represents either one of H, Na, K, CH₃ and C₂H₅; and Rι₇ represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a

CH₃ group, a C2H5 group, a C₃H₇ group, a (CH₃) -CH group or a (CH₃)₃-C group; and in case plural units are present, R₁₅ is the same or different for each unit; and the chemical formula (18) :

represents a (phenylmethyl) oxy group.

6. The polyhydroxy alkanoate copolymer according to claim 4, wherein a number-averaged molecular weight is within a range from 1000 to 1000000.

7. A method for producing a polyhydroxy alkanoate copolymer characterized in including a biosynthesis by a microorganism having an ability of producing a polyhydroxy alkanoate copolymer including at least a 3-hydroxy-ω-alkenoic acid unit represented by a chemical formula (1) in a molecule, and simultaneously at least a 3-hydroxy-ω-alkanoic acid unit represented by a chemical formula (2) or a 3- hydroxy-ω-cyclohexylalkanoic acid unit represented by a chemical formula (3) in the molecule, from at least an ω-alkenoic acid represented by a chemical formula (24) and at least a compound represented by a chemical formula (25) or at least an ω- cyclohexylalkanoic acid represented by a chemical formula ( 26 ) as starting materials [Chemical Formula (24 ) ]

H₂C=HC (CH₂)_p CH₂ CH₂ C OH

= ¹-⁸ (24) in which p represents an integer selected within a range indicated in the chemical formula; [Chemical Formula (25) ]

Ra—(CH₂)q~CH—CH₂—C-OH q = 1-8 (25)

in which q represents an integer selected within a range indicated in the chemical formula; and R₂₃ includes a residue having a phenyl structure or a thienyl structure; [Chemical Formula (26) ]

in which R2 represents a substituent on a cyclohexyl group and represents an H atom, a CN^' group, a NO₂ group, a halogen atom, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CF₃ group, a CF₅ group, or a C₃F₇ group; and r represents an integer selected within a range indicated in the chemical formula; [Chemical Formula (1) ]

in which m represents an integer selected within a range indicated in the chemical formula; R represents a residue having any of a phenyl structure or a thienyl structure; and in case plural units are present, m and R are the same or different for each unit; and [Chemical Formula (3 )

in which Ri represents a substituent on a cyclohexyl group and represents an H atom, a CN group, a N0 group, a halogen atom, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CF₃ group, a C₂F5 group, or a C₃F group; k represents an integer selected within a range indicated in the chemical formula; and in case plural units are present, Ri and k are the same or different for each unit.

8. The method for producing a polyhydroxy alkanoate copolymer according to claim 7, wherein R₂₃ in the chemical formula (25) and R in the chemical formula (2) , each represents a residue having a phenyl structure or a thienyl structure, are selected from chemical formulas (31), (9), (10), (11), (12), (13), (14), (15), (16), (17) and (18): the chemical formula (31) :

represents a group of substituted or non-substituted phenyl groups in which R₂6 represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CH=CH₂ group, a CF₃ group, a C₂F₅ group or a C₃F group; and in case plural units are present, R₂6 is the same or different for each unit; the chemical formula (9) :

represents a group of non-substituted or substituted phenoxy groups in which R₄ represents a .substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0 group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a SCH₃ group, a CF₃ group, a C₂F₅ group, or a C₃F group; and in case plural units are present, R is the same or different for each unit; the chemical formula (10) :

represents a- group of non-substituted or substituted benzoyl groups in which R₅ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and in case plural units are present, R₅ is the same or different for each unit; the chemical formula (11) :

represents a group of substituted or non-substituted phenylsulfanyl groups in which Re represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a NO₂ group, a C00R₇ group, a S0₂Rs group (R₇ representing either one of H, Na, K, CH₃ and C₂H5; and R₈ representing either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, Re is the same or different for each unit; the chemical formula (12) :

represents a group of substituted or non-substituted (phenylmethyl) sulfanyl groups in which R₉ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COORio group, a S0₂R₁₁ group (R_i0 representing either one of H, Na, K, CH₃ and C₂H₅; and Rn representing either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H5) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂ ^_CH group or a (CH₃)₃-C group; and in case plural units are present, Rg is the same or different for each unit; the chemical formula (13) :

represents a 2-thienyl group; the chemical formula (14)

represents a 2-thienylsulfanyl group; the chemical formula (15) :

represents a 2-thienylcarbonyl group; the chemical formula (16) :

represents a group of substituted or non-substituted phenylsulfinyl groups in which R12 represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0 group, a C00Rι₃ group, a Sθ2Rι₄ group (R₁₃ representing either one of H, Na, K, CH₃ and C₂H₅; and R₁₄ representing either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H5 group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R₁₂ is the same or different for each unit; the chemical formula (17):

represents a group of substituted or non-substituted phenylsulfonyl groups in which R₁₅ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COORi₆ group, a Sθ2Rι group (Riβ representing either one of H, Na, K, CH₃ and C₂H₅; and R_i7 representing either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R₁₅ is the same or different for each unit; and the chemical formula (18) :

represents a (phenylmethyl) oxy group.

9. The method for producing a polyhydroxy alkanoate copolymer according to claim 7, wherein said microorganism is cultured in a culture medium including at least an ω-alkenoic acid represented by the chemical formula (24) and at least a compound represented by the chemical formula (25) or at least an ω-cyclohexylalkanoic acid represented by the chemical formula (26) .

10. The method for producing a polyhydroxy alkanoate copolymer according to claim 9, wherein said microorganism is cultured in a culture medium including, in addition to at least an ω-alkenoic acid represented by the chemical formula (24) and at least a compound represented by the chemical formula (25) or at least an ω-cyclohexylalkanoic acid represented by the chemical formula (26), at least one of a peptide, an yeast extract, an organic acid or a salt thereof, an amino acid or a salt thereof, a sugar, a linear alkanoic acid with 4 to 12 carbon atoms or a salt thereof.

11. The method for producing a polyhydroxy alkanoate copolymer according to claim 7, characterized in including a step of culturing said microorganism in a culture medium including at least an ω-alkenoic acid represented by the chemical formula (24) and at least a compound represented by the chemical formula (25) or at least an ω- cyclohexylalkanoic acid represented by the chemical formula (26) , and recovering a polyhydroxy alkanoate copolymer including simultaneously at least a 3- hydroxy-ω-alkenoic acid unit represented by the chemical formula (1) and a 3-hydroxy-ω-alkanoic acid unit represented by the chemical formula (2) or a 3- hydroxy-ω-cyclohexylalkanoic acid unit represented by the chemical formula (3) in the molecule, produced by said microorganism, from cells of the microorganism.

12. The method for producing a polyhydroxy alkanoate copolymer according to claim 7, wherein said microorganism is a microorganism belonging to Pseudomonas genus.

13. The method for producing a polyhydroxy alkanoate copolymer according to claim 12, wherein said microorganism is at least one of Pseudomonas cichorii YN2 strain (FERM BP-7375) , Pseudomonas cichorii H45 strain (^'FERM BP-7374), Pseudomonas jessenii PI61 (FERM BP-7376) and "Pseudomonas putida P91 (FERM BP-7373) .

14. A method for producing a polyhydroxy alkanoate copolymer including at least a 3-hydroxy-ω- carboxyalkanoic acid unit represented by a chemical formula (19) in a molecule, and simultaneously at least a 3-hydroxy-ω-alkanoic acid unit represented by a chemical formula (2) or a 3-hydroxy-ω- cyclohexylalkanoic acid unit represented by a chemical formula (3) in the molecule comprising the steps of: preparing a polyhydroxy alkanoate copolymer including at least a 3-hydroxy-ω-alkenoic acid unit represented by a chemical formula (1) in a molecule, and simultaneously at least a 3-hydroxy-ω-alkanoic acid unit represented by a chemical formula (2) or a 3-hydroxy-ω-cyclohexylalkanoic acid unit represented by a chemical formula (3) in the molecule as a starting material, and oxidizing a double bond portion in the polyhydroxy alkanoate represented in the chemical formula (1) thereby generating a polyhydroxy alkanoate copolymer including at least a 3-hydroxy-ω- carboxyalkanoic acid unit represented by a chemical formula (19) in a molecule, and simultaneously at least a 3-hydroxy-ω-alkanoic acid unit represented by a chemical formula (2) or a 3-hydroxy-ω- cyclohexylalkanoic acid unit represented by a chemical formula (3) in the molecule: [Chemical Formula (1) ]

in which m represents an integer selected within a range indicated in the chemical formula; R includes a residue having any of a phenyl structure and a thienyl structure; and in case plural units are present, m and R are the same or different for each 4/044213

- 205 -

unit;

[Chemical Formula (3) ]

in which Ri represents a substituent on a cyclohexyl group selected from an H atom, a CN group, a N0 group, a halogen atom, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CF₃ group, a C₂F₅ group, and a C₃F₇ group; k represents an integer selected within a range indicated in the chemical formula; and in case plural units are present, Ri and k are the same or different for each unit; and [Chemical Formula (19) ]

n =1-8 (19)

in which n represents an integer selected within a range indicated in the chemical formula; Ris represents an H atom, a Na atom, or a K atom; and in case plural units are present, n and Riβ are the same or different for each unit.

15. The method for producing a polyhydroxy alkanoate copolymer according to claim 14, wherein R in the chemical formula (2) represents a residue having a phenyl structure or a thienyl structure selected from chemical formulas (8), (9), (10), (11), (12), (13), (14), (15), (16), (17) and (18): the chemical formula (8) :

represents a group of non-substituted or substituted phenyl groups in which R₂ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CH=CH₂ group, a COOR₃ group (R₃ representing an H atom, a Na atom or a K atom) , a CF₃ group, a C2F5 group, or a C₃F₇ group; and in case plural units are present, R₂ is the same or different for each unit; the chemical formula (9) :

represents a group of non-substituted or substituted phenoxy groups in which R₄ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a SCH₃ group, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and in case plural units are present, R₄ is the same or different for each unit; the chemical formula (10) :

represents a group of non-substituted or substituted benzoyl groups in which R5 represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H group, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and in case plural units are present, R₅ is the same or different for each unit; the chemical formula (11) :

represents a group of substituted or non-substituted phenylsulfanyl groups in which R₆ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0 group, a COOR group, a S0₂R₈ group (R₇ represents either one of H, Na, K, CH₃ and C₂H₅; and Rs represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃) -CH group or a (CH₃)₃-C group; and in case plural units are present, R is the same or different for each unit; the chemical formula (12) :

represents a group of substituted or non-substituted (phenylmethyl) sulfanyl groups in which R₉ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COORio group, a SO2R1₁ group (R_i0 represents either one of H, Na, K, CH₃ and C₂H5; and Rn represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H5 group, a C₃H₇ group, a (CH₃)₂ ^_CH group or a (CH₃)₃-C group; and in case plural units are present, R₉ is the same or different for each unit; the chemical formula (13) :

represents a 2-thienyl group; the chemical formula (14)

represents a 2-thienylsulfanyl group; the chemical formula (15) :

represents a 2-thienylcarbonyl group; the chemical formula (16) :

represents a group of substituted or non-substituted phenylsulfinyl groups in which Rχ₂ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COOR₁₃ group, a S0₂Rι group (R_i3 represents either one of H, Na, K, CH₃ and C₂H₅; and R_i4 represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R_i2 is the same or different for each unit; the chemical formula (17) :

represents a group of substituted or non-substituted phenylsulfonyl groups in which R_i5 represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a

C00Ri6 group, a S0₂Rι group (Riβ represents either one of H, Na, K, CH₃ and C₂H₅; and R_i7 represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H5 group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R3.5 is the same or different for each unit; the chemical formula (18) :

represents a (phenylmethyl) oxy group.

16. The method according to claim 14, wherein said starting material polyhydroxy alkanoate copolymer including at least a 3-hydroxy-ω-alkenoic acid unit represented by a chemical formula (1) in a molecule, and simultaneously at least a 3-hydroxy-ω- alkanoic acid unit represented by a chemical formula (2) or a 3-hydroxy-ω-cyclohexylalkanoic acid unit represented by a chemical formula (3) in the molecule, is produced by a method according to claim 7.

17. The method for producing a polyhydroxy alkanoate copolymer according to claim 16, wherein R in the chemical formula (2), representing a residue having a phenyl structure or a thienyl structure, is at least one of chemical formulas (31), (9), (10), (11), (12), (13), (14), (15), (16), (17) and (18): the chemical formula (31) :

represents a group of substituted or non-substituted phenyl groups in which R₂6 represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CH=CH₂ group, a CF₃ ^' group, a C2F5 group or a C₃F₇ group; and in case plural units are present, Rs is the same or different for each unit; the chemical formula (9) :

represents a group of non-substituted or substituted phenoxy groups in which R₄ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0 group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a SCH₃ group, a CF₃ group, a C₂F₅ group, or a C₃F group; and in case plural units are present, R₄ is the same or different for each unit; the chemical formula (10) :

represents a group of non-substituted or substituted benzoyl groups in which R₅ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group-, a C₃H₇ group, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and in case plural units are present, R₅ is the same or different for each unit; the chemical formula (11) :

represents a group of substituted or non-substituted phenylsulfanyl groups in which R₆ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a NO₂ group, a COOR₇ group, a S0₂R₈ group (R representing either one of H, Na, K, CH₃ and C₂H₅; and R₈ representing either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂Hs group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R₆ is the same or different for each unit; the chemical formula (12) :

represents a group of substituted or non-substituted (phenylmethyl) sulfanyl groups in which R₉ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COORio group, a S0₂Rn group (Rio representing either one of H, Na, K, CH₃ and C₂H5; and Rn representing either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, Rg is the same or different for each unit; the chemical formula (13) :

represents a 2-thienyl group; the chemical formula (14) :

represents a 2-thienylsulfanyl group; the chemical formula (15) :

represents a 2-thienylcarbonyl group; the chemical formula (16) :

represents a group of substituted or non-substituted phenylsulfinyl groups in which Rι₂ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COORι₃ group, a S0₂Rι₄ group (R_i3 representing either one of H, Na, K, CH₃ and C2H5; and Rι₄ representing either one of OH, ONa, OK, a halogen atom, 0CH₃ and OC₂H5) , a CH₃ group, a C₂H5 group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R₁₂ is the same or different for each unit; the chemical formula (17) :

COORiδ group, a S0₂Rι group (Riε representing either one of H, Na, K, CH₃ and C₂H5; and Rι representing either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H5) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂~CH group or a (CH₃)₃-C group; and in case plural units are present, R₁₅ is the same or different for each unit; and the chemical formula (18) :

represents a (phenylmethyl) oxy group.

18. The producing method according to claim 14, wherein said oxidation reaction is carried out with an oxidant selected from a group consisting of a permanganate, a bichromate and a periodate.

19. The producing method according to claim 18, wherein said oxidation reaction is carried out with a permanganate as an oxidant and under an acidic condition.

20. The producing method according to claim 14, wherein said oxidation reaction is carried out with ozone .

21. The method for producing a polyhydroxy alkanoate copolymer including a biosynthesis by a microorganism having an ability of producing a polyhydroxy alkanoate copolymer including at least a 3-hydroxy-ω-alkoxycarbonylalkanoic acid unit represented by a chemical formula (32) in- a molecule, and simultaneously at least a 3-hydroxy-ω-alkanoic acid unit represented by a chemical formula (2) or a

3-hydroxy-ω-cyclohexylalkanoic acid unit represented by a chemical formula (3) in the molecule, from a dicarboxylic acid monoester compound represented by a chemical formula (42):

R '4.1 H₃C- C₂H₅-

in which p may assume one or more arbitrary integral values within a range indicated in the chemical formula; and R₄₁ may arbitrarily represent one or more residues indicated in the chemical formula; and at least a compound represented by a chemical formula

(25) or at least a ω-cyclohexylalkanoic acid represented by a chemical formula (26) as starting materials : [Chemical Formula (25) ]

R^—(CH₂)q- -CH—CH₂- -C-OH q = 1-8 (25)

in which q represents an integer selected within a range indicated in the chemical formula; and R₂₃ includes a residue having a phenyl structure or a thienyl structure; [Chemical Formula (26)]

in which R₂ represents a substituent on a cyclohexyl group and represents an H atom, a CN group, a N0₂ group, a halogen atom, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CF₃ group, a C₂F₅ group, o a C₃F₇ group; and r represents an integer selected within a range indicated in the chemical formula; [Chemical Formula (32)]

n =1-8 (32)

R 2,7 H₃C- , C 2,H" "5,

in which n represents an integer selected within a range indicated in the chemical formula; R₂₇ represents any of residues indicated in the chemical formula; and in case plural units are present, n and R₂₇ are the same or different for each unit; [Chemical Formula (2)]

in which m represents an integer selected within a range indicated in the chemical formula; R represents a residue having any of a phenyl structure and a thienyl structure; and in case plural units are present, m and R are the same or different for each unit; and [Chemical Formula (3)]

in which Ri represents a substituent on a cyclohexyl group and represents an H atom, a CN group, a N0₂ group, a halogen atom, a CH₃ group, a CH₅ group, a C₃H₇ group, a CF₃ group, a C₂F₅ group, or a C₃F group; k represents an integer selected within a range indicated in the chemical formula; and in case plural units are present, R_x and k are the same or different for each unit.

22. The method for producing a polyhydroxy alkanoate copolymer according to claim 21, wherein R₂₃ in the chemical formula (25) and R in the chemical formula (2), each representing a residue having a phenyl structure or a thienyl structure, represents at least one of chemical formulas (31), (9), (10), (11), (12), (13), (14), (15), (16), (17) and (18): the chemical formula (31) :

represents a group of substituted or non-substituted phenyl groups in which R₆ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a NO2 group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CH=CH₂ group, a CF₃ group, a C₂F5 group or a C₃F₇ group; and in case plural units are present, R₂6 is the same or different for each unit; the chemical formula (9) :

represents a group of non-substituted or substituted phenoxy groups in which R₄ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a SCH₃ group, a CF₃ group, a C₂F₅ group, or a C₃F group; and in case plural units are present, R₄ is the same or different for each unit; the chemical formula (10) :

represents a group of non-substituted or substituted benzoyl groups in which R₅ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and in case plural units are present, R₅ is the same or different for each unit; the chemical formula (11):

represents a group of substituted or non-substituted phenylsulfanyl groups in which represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COOR group, a SO₂R1₃ group (R₇ representing either one of H, Na, K, CH₃ and C₂H₅; and R₈ representing either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R₆ is the same or different for each unit; the chemical formula (12) :

represents a group of substituted or non-substituted (phenylmethyl) sulfanyl groups in which Rg represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a

COORio group, a S0₂Rn group (Rι₀ representing either one of H, Na, K, CH₃ and C2H5; and Rn representing either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃) ~CH group or a (CH₃)₃-C group; and in case plural units are present, Rg is the same or different for each unit; the chemical formula (13) :

represents a 2-thienyl group; the chemical formula (14)

represents a 2-thienylsulfanyl group; the chemical formula (15) :

represents a 2-thienylcarbonyl group; the chemical formula (16) :

represents a group of substituted or non-substituted phenylsul inyl groups in which Rι₂ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COORι₃ group, a S0₂Rι group (Rχ₃ representing either one of H, Na, K, CH₃ and C2H5; and Rι₄ representing either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂--CH group or a (CH₃)₃-C group; and in case plural units are present, R_i2 is the same or different for each unit; the chemical formula (17) :

represents a group of substituted or non-substituted phenylsulfonyl groups in which R₁₅ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COOR16 group, a S0₂Rι₇ group (Rχ₆ representing either one of H, Na, K, CH₃ and C₂H5; and Rι₇ representing either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C2H5 group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R_i5 is the same or different for each unit; and the chemical formula (18) :

represents a (phenylmethyl) oxy group.

23. The method for producing a polyhydroxy alkanoate copolymer according to claim 21, wherein the microorganism is cultured in a culture medium including at least a dicarboxylic acid monoester compound represented by the chemical formula (42) and at least a compound represented by the chemical formula (25) or at least an ω-cyclohexylalkanoic acid represented by the chemical formula (26) .

24. The method for producing a polyhydroxy alkanoate copolymer according to claim 23, wherein the microorganism is cultured in a culture medium including, in addition, at least one of a peptide, an yeast extract, an organic acid or a salt thereof, an amino acid or a salt thereof, a sugar, a linear alkanoic acid with 4 to 12 carbon atoms or a salt thereof.

25. The method for producing a polyhydroxy alkanoate copolymer according to claim 21, characterized in including a step of recovering a polyhydroxy alkanoate copolymer, produced by said microorganism, from cells of the microorganism.

26. The method for producing a polyhydroxy alkanoate copolymer according to claim 21, wherein said microorganism is a microorganism belonging to Pseudomonas genus .

27. The method for producing a polyhydroxy alkanoate copolymer according to claim 26, wherein said microorganism is at least one of Pseudomonas cichorii YN2 strain (FERM BP-7375) , Pseudomonas cichorii H45 strain (FERM BP-7374), Pseudomonas jessenii P161 (FERM BP-7376) and Pseudomonas putida P91 (FERM BP-7373) .

28. A method for producing a polyhydroxy alkanoate copolymer, characterized in employing a polyhydroxy alkanoate copolymer including at least a .3-hydroxy-ω-alkoxycarbonylalkanoic acid unit represented by a chemical formula (32) in a molecule, and simultaneously at least a 3-hydroxy-ω-alkanoic acid unit represented by a chemical formula (2) or a 3-hydroxy-ω-cyclohexylalkanoic acid unit represented by a chemical formula (3) in the molecule as a starting material, and executing a hydrolysis in the presence of an acid or an alkali or executing a hydrogenolysis including a catalytic reduction, thereby generating a polyhydroxy alkanoate copolymer including at least a 3-hydroxy-ω-carboxyalkanoic acid unit represented by a chemical formula (19) in a molecule, and simultaneously at least a 3-hydroxy-ω- alkanoic acid unit represented by a chemical formula

(2) or a 3-hydroxy-ω-cyclohexylalkanoic acid unit represented by a chemical formula (3) in the molecule :

[Chemical Formula (32)]

ⁿ = "⁸ ( 32 )

in which n represents an integer selected within a range indicated in the chemical formula; R₂₇ represents any of residues indicated in the chemical formula; and in case plural units are present, n and R₇ are the same or different for each unit; [Chemical Formula (2)]

in which m represents an integer selected within a range indicated in the chemical formula; R includes a residue having any of a phenyl structure and a thienyl structure; and in case plural units are present, m and R are the same or different for each unit; [Chemical Formula (3) ]

in which Ri represents a substituent on a cyclohexyl group and represents an H atom, a CN group, a N0₂ group, a halogen atom, a CH₃ group, a C₂H₅ group, a C₃H group, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; k represents an integer selected within a range indicated in the chemical formula; and in case plural units are present, Ri and k are the same or different for each unit; and [Chemical Formula (19) ]

n =1-8 (19)

in which n represents an integer selected within a range indicated in the chemical formula; Rι₈ represents an H atom, a Na atom, or a K atom; and in case plural units are present, n and R_i8 are the same or different for each unit.

29. The method for producing a polyhydroxy alkanoate copolymer according to claim 28, wherein R in the chemical formula (2), representing a residue having a phenyl structure or a thienyl structure, represents at least one of chemical formulas (8), (9), (10), (11), (12), (13), (14), (15), (16), (17) and (18) : the chemical formula (8) :

represents a group of non-substituted or substituted phenyl groups in which R₂ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CH=CH group, a COOR₃ group (R₃ representing an H atom, a Na atom or a K atom) , a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and in case plural units are present, R is the same or different for each unit; the chemical formula (9) :

represents a group of non-substituted or substituted phenoxy groups in which R represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a SCH₃ group, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and in case plural units are present, R is the same or different for each unit; the chemical formula (10) :

represents a group of non-substituted or substituted benzoyl groups in which R₅ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0 group, a CH₃ group, a C₂H₅ group, a C₃H₇ group, a CF₃ group, a C₂F₅ group, or a C₃F₇ group; and in case plural units are present, R₅ is the same or different for each unit; the chemical formula (11) :

represents a group of substituted or non-substituted phenylsulfanyl groups in which R₆ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COOR₇ group, a Sθ2R₈ group (R₇ represents either one of H, Na, K, CH₃ and C₂H₅; and R₈ represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂~CH group or a (CH₃)₃-C group; and in case plural units are present, Re is the same or different for each unit; the chemical formula (12) :

represents a group of substituted or non-substituted (phenylmethyl) sulfanyl groups in which Rg represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a NO₂ group, a COORio group, a S0₂Rn group (Rι₀ represents either one of H, Na, K, CH₃ and C₂H₅; and Rn represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, Rg is the same or different for each unit; the chemical formula (13) :

represents a 2-thienyl group; the chemical formula (14)

represents a 2-thienylsulfanyl group; the chemical formula (15) :

represents a 2-thienylcarbonyl group; the chemical formula (16) :

represents a group of substituted or non-substituted phenylsulfinyl groups in which R₁₂ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0 group, a

C00Rι₃ group, a S0₂Rι group (R_i3 represents either one of H, Na, K, CH₃ and C₂H5; and R₄ represents either one of OH, ONa, OK, a halogen atom, OCH₃ and OC₂H₅) , a CH₃ group, a C2H5 group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R_i2 is the same or different for each unit; the chemical formula (17) :

represents a group of substituted or non-substituted phenylsulfonyl groups in which R₁₅ represents a substituent on an aromatic ring and represents an H atom, a halogen atom, a CN group, a N0₂ group, a COORiδ group, a S0₂Rι group (R_i6 represents either one of H, Na, K, CH₃ and C₂H₅; and R_i7 represents either one of OH, ONa, OK, a halogen atom, 0CH₃ and OC₂H₅) , a CH₃ group, a C₂H₅ group, a C₃H₇ group, a (CH₃)₂-CH group or a (CH₃)₃-C group; and in case plural units are present, R₁5 is the same or different for each unit; and the chemical formula (18) :

represents a (phenylmethyl) oxy group.