JP2959747B2 - Savory whey protein hydrolyzate and method for producing the same - Google Patents

Savory whey protein hydrolyzate and method for producing the same

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Publication number
JP2959747B2
JP2959747B2 JP6274303A JP27430394A JP2959747B2 JP 2959747 B2 JP2959747 B2 JP 2959747B2 JP 6274303 A JP6274303 A JP 6274303A JP 27430394 A JP27430394 A JP 27430394A JP 2959747 B2 JP2959747 B2 JP 2959747B2
Authority
JP
Japan
Prior art keywords
whey protein
weight
hydrolyzate
amount
solution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP6274303A
Other languages
Japanese (ja)
Other versions
JPH08112063A (en
Inventor
誠一 島村
吉隆 田村
仁志 齋藤
奈生子 磯村
陽子 赤染
浩 越智
美穂子 河本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Morinaga Nyugyo KK
Original Assignee
Morinaga Nyugyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP6274303A priority Critical patent/JP2959747B2/en
Application filed by Morinaga Nyugyo KK filed Critical Morinaga Nyugyo KK
Priority to US08/817,095 priority patent/US5952193A/en
Priority to DK95934302T priority patent/DK0799577T3/en
Priority to PCT/JP1995/002109 priority patent/WO1996011584A1/en
Priority to EP95934302A priority patent/EP0799577B1/en
Priority to DE69523791T priority patent/DE69523791T2/en
Priority to AU36738/95A priority patent/AU692612B2/en
Priority to NZ294046A priority patent/NZ294046A/en
Priority to CA002202633A priority patent/CA2202633C/en
Publication of JPH08112063A publication Critical patent/JPH08112063A/en
Priority to AU63603/98A priority patent/AU701507B2/en
Priority to US09/316,957 priority patent/US6395508B1/en
Application granted granted Critical
Publication of JP2959747B2 publication Critical patent/JP2959747B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、特異な理化学的性状を
有する乳清蛋白加水分解物及びその製造法に係るもので
あり、腸管吸収性及びアミノ酸バランスに優れ、食餌ア
レルギーに対する予防及び治療効果並びに抗酸化作用を
有し、風味が良好であり、広範な種々の用途に利用でき
る新規な乳清蛋白加水分解物及びその製造法である。本
明細書において、百分率は透過率及び抑制率を除き、特
に断りのない限り、重量による表示である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a whey protein hydrolyzate having a unique physicochemical property and a method for producing the same, which is excellent in intestinal absorbability and amino acid balance, and has a preventive and therapeutic effect on food allergy. A novel whey protein hydrolyzate having an antioxidant effect, having a good flavor, and being usable for a wide variety of uses, and a method for producing the same. In the present specification, percentages are by weight, except for transmittance and suppression, unless otherwise specified.

【0002】[0002]

【従来の技術】最近、消化吸収の観点から、遊離アミノ
酸混合物よりもオリゴペプチドが、吸収速度及び吸収後
のアミノ酸バランスにおいて優れていることが明らかに
されている(酪農科学・食品の研究、第39巻、第A−
283ページ、1990年)。一方、食餌蛋白質に起因
するアレルギー患者が急増し、特に乳児においては乳清
蛋白質、特にβ−ラクトグロブリンに起因するアレルギ
ーが多発していることが明らかになり(酪農科学・食品
の研究、第39巻、第A−283ページ、1990
年)、乳児用食品中の乳清蛋白質の抗原性低減又は乳児
用食品からの乳清蛋白質抗原の実質的除去が、求められ
ている。
2. Description of the Related Art Recently, it has been revealed that oligopeptides are superior to free amino acid mixtures in terms of absorption rate and amino acid balance after absorption from the viewpoint of digestion and absorption (dairy science and food research, No. Volume 39, A-
283, 1990). On the other hand, the number of allergic patients caused by dietary protein has increased rapidly, and it has been revealed that allergies caused by whey protein, particularly β-lactoglobulin, occur particularly frequently in infants (dairy science and food research, No. 39). Vol. A-283, 1990
There is a need to reduce the antigenicity of whey proteins in infant foods or to substantially remove whey protein antigens from infant foods.

【0003】乳児用食品中の乳清蛋白質の抗原性低減又
は乳児用食品からの乳清蛋白質抗原の実質的除去の手段
として、乳清蛋白質の加水分解が広範に採用されている
が、アミノ酸遊離率の極端に低い分解物は苦味を呈する
場合が多く、摂取するときの障害となることがある。ま
た、乳清蛋白質の加水分解物は、熱に対して不安定にな
る場合があるので、溶液の状態では沈殿物の生成、褐変
化等の不都合が生じ、従来の分解物は経口栄養剤等とし
て利用するときに問題があった。
[0003] Whey protein hydrolysis is widely used as a means of reducing the antigenicity of whey protein in infant foods or substantially removing whey protein antigens from infant foods. Degradants with extremely low rates often have a bitter taste and can be a hindrance to ingestion. In addition, the hydrolyzate of whey protein may be unstable to heat, so that in the state of a solution, inconveniences such as formation of a precipitate and browning occur, and the conventional hydrolyzate is used as an oral nutritional supplement. There was a problem when using as.

【0004】更に、乳清蛋白加水分解物を食品に使用す
る場合、特に脂肪と共存する食品(例えば、乳幼児用の
調製粉乳では、100g当たり脂肪が27%も含まれて
いる)においては、酸化防止が重大な問題となってい
る。即ち、脂肪を含有する食品においては、栄養学的な
観点から飽和脂肪酸と不飽和脂肪酸とのバランスが考慮
されているが、特に不飽和脂肪酸は容易に酸化される欠
点があり、最近、脳・神経・網膜組織の生体膜に多く含
まれ、その機能発現に関与していると考えられているD
HA等は、一旦酸化されると極めて強い酸化臭を放出
し、製品品質に著しい悪影響を与えるため、酸化の進行
防止が待望されている。
[0004] Furthermore, when whey protein hydrolyzate is used in foods, particularly in foods that coexist with fats (for example, in the case of infant formula containing 27% fat per 100 g), oxidization is difficult. Prevention is a serious problem. That is, in foods containing fats, the balance between saturated fatty acids and unsaturated fatty acids is considered from a nutritional point of view. However, unsaturated fatty acids have a disadvantage that they are easily oxidized. D, which is widely contained in biological membranes of nerve and retinal tissues and is thought to be involved in the expression of its functions
Once oxidized, HA and the like emit an extremely strong oxidized odor, which has a significant adverse effect on product quality, and thus prevention of oxidation is expected.

【0005】一方、摂取したアミノ酸がトランスグルタ
ミナーゼ、グルタメートデヒトロゲナーゼ等によって分
解されて、アンモニアが生成するが、生成したアンモニ
アは有毒であり、肝臓で直ちに処理される必要があり、
摂取する食品にアンモニアが含有されていないことが必
要である。このような点から、乳清蛋白加水分解物に
も、アンモニアが含有されていないことが、極めて重要
である。
On the other hand, ingested amino acids are decomposed by transglutaminase, glutamate dehumangenase and the like to produce ammonia. The produced ammonia is toxic and needs to be processed immediately in the liver.
It is necessary that the food to be consumed does not contain ammonia. From such a point, it is extremely important that the whey protein hydrolyzate also does not contain ammonia.

【0006】また、成長した動物の窒素平衡は、窒素の
最低代謝量に見合う量の窒素を摂取すればよいが、この
窒素を単にアンモニアとして与えても無効であり、必須
アミノ酸として摂取しなければならない。そのために
は、摂取する食品に必要量の必須アミノ酸が含まれてい
なければならない。
[0006] In addition, the nitrogen balance of a grown animal can be obtained by ingesting an amount of nitrogen commensurate with the minimum amount of metabolism of nitrogen. However, simply giving this nitrogen as ammonia is ineffective and must be taken as an essential amino acid. No. To do so, the foods consumed must contain the required amount of essential amino acids.

【0007】以上のような蛋白質及びアミノ酸の栄養・
生理学の背景から、乳清蛋白質を酵素で加水分解した分
解物を製造する種々の方法が開発されているが、それら
の幾つかを例示すれば次のとおりである。
The nutrition of proteins and amino acids as described above
From the background of physiology, various methods have been developed for producing hydrolysates of whey proteins hydrolyzed with enzymes, some of which are as follows.

【0008】1)乳清蛋白質をバシラス・サチリス由来
のエンドペプチダーゼとトリプシンの2種類の酵素、又
はバシラス・サチリス由来のエンドペプチダーゼ、トリ
プシン及びキモトリプシンの3種類の酵素で分解し、分
子量2,000ダルトン以下、抗原残存率10-4以下、
アミノ酸遊離率が5%以下のオリゴペプチド混合物が開
示されている(特開平4−248959号公報)。
1) Whey protein is decomposed with two kinds of enzymes, Bacillus subtilis-derived endopeptidase and trypsin, or Bacillus subtilis-derived endopeptidase, trypsin and chymotrypsin, and has a molecular weight of 2,000 daltons. Below, antigen residual rate 10 -4 or less,
An oligopeptide mixture having an amino acid release rate of 5% or less has been disclosed (JP-A-4-248959).

【0009】2)乳蛋白質をアルカリプロテアーゼで分
解し、ジペプチド及びトリペプチドが75モル%以上、
アミノ酸遊離率が5%未満、4個以上のアミノ酸からな
り、かつ平均鎖長6.2のペプチドが20モル%未満の
分解物が開示されている(特表平5−505304号公
報)。
2) The milk protein is decomposed with an alkaline protease, and the dipeptide and the tripeptide are at least 75 mol%,
A degradation product having an amino acid release rate of less than 5%, consisting of 4 or more amino acids, and having an average chain length of 6.2 and a peptide content of less than 20 mol% is disclosed (Japanese Patent Publication No. 5-505304).

【0010】3)乳清、カゼイン、大豆をペプシン、ト
リプシン・キモトリプシンで分解し、限外濾過し、4〜
10個のアミノ酸を有するペプチドが40〜60%であ
り、分子量60,000ダルトン以下のオリゴペプチド
が開示されている(特開平3−187348号公報)。
3) Whey, casein and soybeans are decomposed with pepsin, trypsin and chymotrypsin, ultrafiltered, and
Oligopeptides having a peptide having 10 amino acids at 40 to 60% and a molecular weight of 60,000 daltons or less have been disclosed (JP-A-3-187348).

【0011】4)乳清蛋白質を熱変性させながらpH6
〜10、60〜80℃で分解し、酵素を加熱失活し、分
子量10000ダルトン以下、メインピーク1,000
〜5,000、平均ペプチド鎖長3〜8、遊離アミノ酸
含量20%以下、β−ラクトグロブリンの抗原性1/1
0,000以下の分解物が開示されている(特開平4−
112753号公報)。
4) While heat denaturing the whey protein, pH 6
Decomposes at -10, 60-80 ° C, deactivates the enzyme by heating, has a molecular weight of 10,000 daltons or less, and has a main peak of 1,000.
5,000, average peptide chain length 3-8, free amino acid content 20% or less, antigenicity of β-lactoglobulin 1/1
A decomposition product of not more than 0000 is disclosed (Japanese Unexamined Patent Publication No.
No. 112753).

【0012】5)牛乳蛋白質をトリプシン、α−キモト
リプシン、アスペルギルス属、バシラス属菌の酵素で分
解し、分子量10,000ダルトン以下の経口免疫寛容
誘導能を有する低アレルゲン性ペプチドが開示されてい
る(特開平5−5000号公報)。
5) Disclosed is a low-allergenic peptide having the ability to induce oral immune tolerance with a molecular weight of 10,000 daltons or less by decomposing cow's milk protein with enzymes of trypsin, α-chymotrypsin, Aspergillus and Bacillus. (JP-A-5-5000).

【0013】6)カゼインを酸性プロテアーゼで分解
し、中性でペプチダーゼで分解し、分子量3,000ダ
ルトン以下、遊離アミノ酸含量30〜55%、α−カ
ゼインに対するELISA抑制試験がα−カゼインの
10,000分の1以下、5%溶液の苦味官能値がカフ
ェイン0.04%水溶液相当以下のペプチドが開示され
ている(特開平6−113893号公報)。
[0013] 6) casein digested with acid protease, decomposes at peptidase at neutral, the molecular weight of 3,000 daltons or less, free amino acid content 30~55%, α S - ELISA inhibition test against casein alpha S - casein Peptides having a bitterness sensory value of 1 / 10,000 or less and a bitterness sensory value of a 5% solution corresponding to a 0.04% aqueous solution of caffeine or less have been disclosed (JP-A-6-113893).

【0014】7)ホエーを中性プロテアーゼ(アスペル
ギルス属)を用いてpH5〜11で加水分解し、pH2
〜4で加熱し、沈殿を除去し、ジペプチド及びトリペプ
チドを50%の割合で得る方法が開示されている(特公
平5−82412号公報)。
7) Whey is hydrolyzed with a neutral protease (Aspergillus) at pH 5 to 11,
A method of heating at 加熱 4 to remove the precipitate and obtaining a dipeptide and a tripeptide at a ratio of 50% is disclosed (Japanese Patent Publication No. 5-82412).

【0015】[0015]

【発明が解決しようとする課題】しかしながら、前記従
来技術においては、乳清蛋白加水分解物の抗原性の低
下、苦味の改善、遊離アミノ酸含量、分子量分布等につ
いては、考慮されているが、乳清蛋白加水分解物のアン
モニア含有量及び抗酸化作用については何等考慮されて
いない。そのため、従来、乳清蛋白加水分解物を広範な
食品に使用できないという不都合があった。
However, in the above-mentioned prior art, reduction of antigenicity of whey protein hydrolyzate, improvement of bitterness, free amino acid content, molecular weight distribution, etc. are taken into consideration. No consideration has been given to the ammonia content and antioxidant activity of the hydrolyzate of Qinghai protein. Therefore, there has been a disadvantage that the whey protein hydrolyzate cannot be used for a wide range of foods.

【0016】本発明者らは、前記の従来技術に鑑みて鋭
意研究を行い、乳清蛋白質を加水分解することによって
得られ、食餌アレルギーの回避、予防及び治療に有効で
あり、消化吸収に優れ、アンモニア含有量が低く、かつ
抗酸化作用を有し、広範囲な用途に利用できる風味良好
な乳清蛋白加水分解物及びその製造法を見い出し、本発
明を完成した。
The present inventors have conducted intensive studies in view of the above-mentioned prior art, and obtained by hydrolyzing whey protein, are effective in avoiding, preventing and treating food allergy, and have excellent digestion and absorption. The present inventors have found a whey protein hydrolyzate having a low ammonia content, having an antioxidant effect, and having a good flavor which can be used for a wide range of applications, and a method for producing the same, and have completed the present invention.

【0017】本発明の目的は、腸管吸収及びアミノ酸バ
ランスに優れ、食餌アレルギーの予防及び治療効果並び
に抗酸化作用を有し、アンモニア含有量が低く、広範囲
な用途に利用できる風味良好な乳清蛋白加水分解物及び
その製造法を提供することである。
It is an object of the present invention to provide a whey protein which is excellent in intestinal absorption and amino acid balance, has an effect of preventing and treating dietary allergy, has an antioxidant effect, has a low ammonia content, and has a good flavor which can be used for a wide range of applications. An object of the present invention is to provide a hydrolyzate and a method for producing the hydrolyzate.

【0018】[0018]

【課題を解決するための手段】前記課題を解決する本発
明の第1の発明は、純度が少なくとも70%(重量)の
乳清蛋白質の加水分解物であって、次のa)〜h)の理
化学的性質; a)分子量5,000〜10,000ダルトンの画分
が、全加水分解物の1%(重量)未満であること、 b)抗乳清蛋白質血清を用いたエライザ抑制試験法によ
り測定した抗原残存活性が10-5以下であること、 c)加水分解物の全アミノ酸の量に対する遊離アミノ酸
の量の割合が10〜15%(重量)であること、 d)乳清蛋白質に含まれる全リジンの量に対する遊離リ
ジンの量の割合が12〜20%(重量)であること、 e)アンモニア含量が0.2%(重量)以下であるこ
と、 f)10%(重量)溶液を1cmのセル、540nmで
測定した透過率が98%以上であること、 g)pH4〜7の5%(重量)溶液を120℃で10分
間加熱して沈殿を生じないこと、及び h)抗酸化作用を有すること、を有することを特徴とす
る風味良好な乳清蛋白加水分解物である。
According to a first aspect of the present invention, there is provided a hydrolyzate of whey protein having a purity of at least 70% (by weight), comprising the following a) to h): A) that the fraction having a molecular weight of 5,000 to 10,000 daltons is less than 1% (by weight) of the total hydrolyzate; b) ELISA test using anti-whey protein serum it residual antigenic activity as measured by is 10 -5 or less, the proportion of the amount of free amino acids relative to the amount of total amino acids of c) hydrolyzate is 10-15% (by weight), d) the whey protein E) the ratio of the amount of free lysine to the total amount of lysine contained is 12 to 20% (by weight); e) the ammonia content is not more than 0.2% (by weight); f) a 10% (by weight) solution. Is a 1 cm cell and the transmittance measured at 540 nm is G) a 5% (weight) solution having a pH of 4 to 7 is heated at 120 ° C. for 10 minutes to prevent precipitation, and h) has an antioxidant effect. It is a whey protein hydrolyzate having a good flavor.

【0019】前記課題を解決する本発明の第2の発明
は、純度が少なくとも70%(重量)の乳清蛋白質を1
5%(重量)以下の濃度で水に溶解し、該水溶液のpH
を7.5〜10に調整し、該水溶液にバシラス・サチリ
ス(Bacillus subtilis) 由来のエンドペプチダーゼ及び
乳酸菌由来のエキソペプチダーゼの2種類の蛋白分解酵
素を添加して加水分解を開始し、分解液中の遊離リジン
量を経時的に測定し、出発原料である乳清蛋白質に含ま
れる全リジンの量に対する遊離リジンの量の割合が12
〜20%(重量)の範囲で加水分解を停止し、限外濾過
して分子量10,000ダルトン以上の画分を完全に除
去することを特徴とする風味良好な乳清蛋白加水分解物
の製造法である。
According to a second aspect of the present invention for solving the above-mentioned problems, the present invention relates to a method for preparing one whey protein having a purity of at least 70% (by weight).
Dissolve in water at a concentration of 5% (weight) or less, and adjust the pH of the aqueous solution.
Was adjusted to 7.5 to 10, and two kinds of proteolytic enzymes, endopeptidase derived from Bacillus subtilis and exopeptidase derived from lactic acid bacteria, were added to the aqueous solution to start hydrolysis, and hydrolysis was started. The amount of free lysine was measured over time, and the ratio of the amount of free lysine to the amount of total lysine contained in whey protein as a starting material was 12%.
Production of a hydrolyzate of good flavor, characterized in that the hydrolysis is stopped in the range of -20% (weight) and ultrafiltration is carried out to completely remove the fraction having a molecular weight of 10,000 daltons or more. Is the law.

【0020】次に本発明について詳述するが、本発明の
理解を容易にするために、本発明の第2の発明から説明
する。本発明の方法の出発原料として使用する乳清蛋白
質は、少なくとも70%の純度を有する市販品等が使用
可能であり、乳清蛋白濃縮物(WPC)、乳清蛋白分離
物(WPI)として知られているより純度の高い市販品
等が好適である。これらの乳清蛋白質を15%以下、望
ましくは8〜12%、の濃度で水に溶解し、アルカリ水
溶液でpHを7.5〜10、望ましくは8〜9、に調整
する。
Next, the present invention will be described in detail. In order to facilitate understanding of the present invention, the second invention of the present invention will be described. As the whey protein used as a starting material of the method of the present invention, a commercially available product having a purity of at least 70% can be used, and it is known as whey protein concentrate (WPC) and whey protein isolate (WPI). A commercially available product having a higher purity than that which has been used is suitable. These whey proteins are dissolved in water at a concentration of 15% or less, preferably 8 to 12%, and the pH is adjusted to 7.5 to 10, preferably 8 to 9 with an alkaline aqueous solution.

【0021】次いで、前記乳清蛋白溶液にバシラス・サ
チリス(Bacillus subtilis) 由来のエンドペプチダーゼ
及び乳酸菌由来のエキソペプチダーゼの2種類の蛋白分
解酵素を添加する。その他、トリプシン、パパイン等の
エンドペプチダーゼを極少量添加することもできる。た
だし、乳酸菌由来以外のエキソペプチダーゼ(パンクレ
アチン等を含む)の添加は、風味を悪化させるので避け
るべきである。バシラス・サチリス(Bacillus subtili
s) 由来のエンドペプチダーゼは、市販品等が使用可能
であり、乳清蛋白質1g当たり1,000〜7,500
PUN単位(この単位については後記する)、望ましく
は2,000〜3,000PUN単位、の割合で添加す
る。
Next, two types of proteolytic enzymes, endopeptidase derived from Bacillus subtilis and exopeptidase derived from lactic acid bacteria, are added to the whey protein solution. In addition, an endopeptidase such as trypsin and papain can be added in a very small amount. However, the addition of exopeptidases (including pancreatin and the like) other than those derived from lactic acid bacteria should be avoided because they deteriorate the flavor. Bacillus subtili
As the endopeptidase derived from s), commercially available products and the like can be used, and 1,000 to 7,500 per gram of whey protein is used.
It is added in a ratio of PUN unit (this unit will be described later), preferably 2,000 to 3,000 PUN unit.

【0022】PUN単位は、カゼイン[ハマーシュタイ
ン(Hammerstein) 。メルク社製]にバシラス・サチリス
(Bacillus subtilis) 由来のエンドペプチダーゼを作用
させ、30℃で1分間に1μgのチロシンに相当するア
リルアミノ酸のフォリン試薬での呈色反応を示す酵素活
性を1PUN単位とする。
The PUN unit is casein [Hammerstein]. Made by Merck] to Bacillus subtilis
(Bacillus subtilis) -derived endopeptidase is allowed to act, and the enzymatic activity showing a color reaction of an allyl amino acid corresponding to 1 μg of tyrosine with a Folin reagent per minute at 30 ° C. is defined as 1 PUN unit.

【0023】乳酸菌由来のエキソペプチダーゼは、例え
ば特公昭54−36235号公報第6欄4行「(3)使
用する酵素について」の項に記載の方法により次のとお
り製造することができる。乳酸菌(ビフィズス菌を含
む)を公知の方法(例えば特公昭48−43878号公
報記載の方法)により培養し、得られた培養液を遠心分
離して乳酸菌菌体を回収し、滅菌水に菌体を懸濁し、遠
心分離して乳酸菌菌体を回収する操作を2回反復し、菌
体を洗浄し、20%の濃度で菌体を滅菌水に懸濁し、菌
体破砕機[例えば、ダイノミル(Willy Bachnfen Engin
eering Works)社製。KDL型]により菌体を破砕し、
凍結乾燥し、乳酸菌由来のエキソペプチダーゼ粉末を得
る。この酵素を乳清蛋白質1g当たり20〜200活性
単位(この単位については後記する)、望ましくは60
〜90活性単位、の割合で添加する。
Exopeptidases derived from lactic acid bacteria can be produced, for example, by the method described in JP-B-54-36235, column 6, line 4, “(3) Enzymes to be used” as follows. Lactic acid bacteria (including bifidobacteria) are cultured by a known method (for example, the method described in JP-B-48-43878), and the resulting culture is centrifuged to collect the lactic acid bacteria cells, and the cells are placed in sterile water. Is suspended, centrifuged, and the operation of collecting lactic acid bacteria cells is repeated twice, the cells are washed, the cells are suspended in sterilized water at a concentration of 20%, and a cell disrupter [eg, Dynomill ( Willy Bachnfen Engin
eering Works). KDL type] to disrupt cells,
Lyophilize to obtain lactic acid bacteria-derived exopeptidase powder. This enzyme is used in an amount of 20 to 200 active units per gram of whey protein (this unit will be described later), preferably 60 to 200 active units.
9090 activity units.

【0024】活性単位は、次の方法により測定する。エ
キソペプチダーゼを含有する粉末を0.2g/100m
lの割合で0.1モルのリン酸緩衝液(pH7.0)に
分散又は溶解して酵素溶液を調製する。一方、ロイシル
パラニトロアニリド(国産化学社製。以後Leu−pN
Aと記載する)を0.1モルのリン酸緩衝液(pH7.
0)に溶解して2mMの基質溶液を調製する。酵素溶液
1mlに基質溶液1mlを添加し、37℃で5分間反応
させ、のち30%の酢酸溶液2mlを添加して反応を停
止させる。反応液をメンブランフィルターで濾過し、波
長410nmで濾液の吸光度を測定する。エキソペプチ
ダーゼの活性単位は、1分間に1μmolのLeu−p
NAを分解するのに必要な酵素量を1活性単位と定義
し、次式により求めた。 活性単位(粉末1g当たり)=20×(A/B) ただし、前記の式においてA及びBは、それぞれ波長4
10nmにおける試料の吸光度及び0.25mMパラニ
トロアニリンの吸光度を示す。
The activity unit is measured by the following method. 0.2 g / 100 m of powder containing exopeptidase
An enzyme solution is prepared by dispersing or dissolving at a ratio of 1 in 0.1 mol phosphate buffer (pH 7.0). On the other hand, leucyl paranitroanilide (manufactured by Kokusan Chemical Co., Ltd .; hereinafter, Leu-pN)
A) as a 0.1 M phosphate buffer (pH 7.
Dissolve in 0) to prepare a 2 mM substrate solution. 1 ml of the substrate solution is added to 1 ml of the enzyme solution and reacted at 37 ° C. for 5 minutes, and then 2 ml of a 30% acetic acid solution is added to stop the reaction. The reaction solution is filtered with a membrane filter, and the absorbance of the filtrate is measured at a wavelength of 410 nm. The activity unit of exopeptidase is 1 μmol of Leu-p per minute.
The amount of enzyme required to degrade NA was defined as one activity unit, and was determined by the following equation. Active unit (per 1 g of powder) = 20 × (A / B) where A and B each represent a wavelength of 4
The absorbance of the sample at 10 nm and the absorbance of 0.25 mM paranitroaniline are shown.

【0025】酵素を添加した溶液を30〜60℃、望ま
しくは45〜55℃に保持して乳清蛋白質の加水分解を
開始する。なお、加水分解反応が進行してpHが低下す
る場合には、そのpHを6以上、好ましくは6〜7に保
持することが望ましい。加水分解を開始後、経時的に分
解液中の遊離リジン量を測定し得る装置、例えば、バイ
オテックアナライザー(旭化成工業社製)等、を用いて
経時的に分解液中の遊離リジン量を測定し、出発原料で
ある乳清蛋白質に含まれる全リジンの量に対する遊離リ
ジンの量の割合が12〜20%、望ましくは14〜17
%、の範囲に達したとき、直ちに反応液を加熱(例え
ば、85℃で15分間等)して酵素を失活させ、加水分
解を停止する。
The enzyme-added solution is maintained at 30 to 60 ° C., preferably 45 to 55 ° C., to start hydrolysis of whey protein. When the hydrolysis reaction proceeds to lower the pH, it is desirable to maintain the pH at 6 or more, preferably 6 to 7. After the hydrolysis is started, the amount of free lysine in the decomposition solution is measured over time using a device capable of measuring the amount of free lysine in the decomposition solution over time, such as a biotech analyzer (manufactured by Asahi Kasei Kogyo). The ratio of the amount of free lysine to the total amount of lysine contained in whey protein as a starting material is 12 to 20%, preferably 14 to 17%.
%, The reaction solution is immediately heated (for example, at 85 ° C. for 15 minutes) to inactivate the enzyme and stop the hydrolysis.

【0026】得られた反応液をクエン酸等の酸によりp
Hを5.5〜7の範囲に調整し、公知の装置[例えば、
限外濾過モジュール(旭化成工業社製)等]により限外
濾過し、分子量10,000ダルトン以上の画分を完全
に除去し、目的とする風味良好な乳清蛋白加水分解物を
得る。この乳清蛋白加水分解物を含有する液を、公知の
方法により濃縮し、濃縮液とすることもでき、更にこの
濃縮液を公知の方法により乾燥し、粉末とすることもで
きる。
The resulting reaction solution is p-pulped with an acid such as citric acid.
H is adjusted to a range of 5.5 to 7, and a known device [for example,
Ultrafiltration module (manufactured by Asahi Kasei Kogyo Co., Ltd.)] to completely remove the fraction having a molecular weight of 10,000 daltons or more, to obtain the desired flavored whey protein hydrolyzate. The liquid containing the whey protein hydrolyzate can be concentrated by a known method to obtain a concentrated liquid, and the concentrated liquid can be dried by a known method to obtain a powder.

【0027】以上のようにして得られた乳清蛋白加水分
解物は、後記する実施例からも明らかなように次の理化
学的性状を有している。 a)図1に示すとおり、分子量5,000〜10,00
0ダルトンの画分が、全加水分解物の1%(重量)未満
であり、分子量10,000ダルトン以上の画分を含ま
ず、分子量1,000ダルトン未満の画分が70%以上
であり、分子量500ダルトン及び分子量1,000ダ
ルトンにピークを有し、数平均分子量300〜400ダ
ルトン、重量平均分子量600〜800ダルトンであ
る。図1は、実施例1により得られた本発明の乳清蛋白
加水分解物の分子量分布を示し、縦軸及び横軸は、それ
ぞれ分布割合及び分子量を示す。
The whey protein hydrolyzate obtained as described above has the following physicochemical properties, as is clear from the examples described later. a) As shown in FIG. 1, the molecular weight is 5,000 to 10,000.
0 dalton fraction is less than 1% (by weight) of the total hydrolyzate, does not include a fraction having a molecular weight of 10,000 daltons or more, and a fraction having a molecular weight of less than 1,000 daltons is 70% or more; It has peaks at a molecular weight of 500 daltons and a molecular weight of 1,000 daltons, with a number average molecular weight of 300-400 daltons and a weight average molecular weight of 600-800 daltons. FIG. 1 shows the molecular weight distribution of the whey protein hydrolyzate of the present invention obtained in Example 1, and the vertical and horizontal axes show the distribution ratio and the molecular weight, respectively.

【0028】b)図2に示すとおり、抗乳清蛋白質血清
を用いたエライザ抑制試験法により測定した抗原残存活
性が10−5以下、望ましくは10−6以下である。図
2は、実施例1により得られた本発明の乳清蛋白加水分
解物の抗原残存活性を示し、縦軸及び横軸は、それぞれ
抑制割合及び最終試料濃度を示す。図中+及び□は、そ
れぞれ本発明の乳清蛋白分解物及び乳清蛋白質を示す。
B) As shown in FIG. 2, the residual antigen activity measured by ELISA test using anti-whey protein serum is 10 −5 or less, preferably 10 −6 or less. FIG. 2 shows the antigen remaining activity of the whey protein hydrolyzate of the present invention obtained in Example 1, and the ordinate and abscissa show the inhibition ratio and the final sample concentration, respectively. In the figure, + and □ indicate the whey protein hydrolyzate and the whey protein of the present invention , respectively.

【0029】c)加水分解物の全アミノ酸の量に対する
遊離アミノ酸の量の割合が10〜15%(重量)、望ま
しくは11〜13%(重量)である。 d)乳清蛋白質に含まれる全リジンの量に対する遊離リ
ジンの量の割合が12〜20%(重量)、望ましくは1
4〜17%(重量)である。 e)アンモニア含量が0.2%(重量)以下、望ましく
は0.1%(重量)以下である。 f)10%溶液を1cmのセル、540nmで測定した
透過率が98%以上である。 g)pH4〜7の5%(重量)溶液を120℃で10分
間加熱して沈殿を生じない。
C) The ratio of the amount of free amino acids to the total amount of amino acids in the hydrolyzate is 10 to 15% by weight, preferably 11 to 13% by weight. d) The ratio of the amount of free lysine to the total amount of lysine contained in whey protein is 12 to 20% (by weight), preferably 1
4 to 17% (weight). e) The ammonia content is 0.2% (weight) or less, desirably 0.1% (weight) or less. f) The transmittance of the 10% solution measured at 540 nm in a 1 cm cell is 98% or more. g) A 5% (by weight) solution of pH 4-7 is heated at 120 ° C. for 10 minutes without precipitation.

【0030】h)図3に示すとおり、公知の抗酸化剤で
あるα−トコフェロールと同等又はそれ以上の抗酸化活
性を有する。図3は、実施例1により得られた本発明の
乳清蛋白加水分解物の抗酸化活性を示し、縦軸及び横軸
は、それぞれ抗酸化能残存率及び時間を示す。図中◇、
+及び□は、それぞれ本発明の乳清蛋白分解物、α−ト
コフェロール及び対照(試料又は標品無添加)を示す。
H) As shown in FIG. 3, it has an antioxidant activity equal to or higher than that of α-tocopherol which is a known antioxidant. FIG. 3 shows the antioxidant activity of the whey protein hydrolyzate of the present invention obtained in Example 1, and the ordinate and the abscissa show the antioxidant ability remaining rate and time, respectively. In the figure,
+ And □ indicate the whey protein hydrolyzate of the present invention, α-tocopherol and a control (no sample or standard added), respectively.

【0031】次に、試験例を示して本発明を詳述する。
本発明の試験例においては、次の試験方法を採用した。 (1)分子量の測定方法 高速液体クロマトグラフィー(宇井信生ら編、「タンパ
ク質・ペプチドの高速液体クロマトグラフィー」、化学
増刊第102号、第241ページ、化学同人、1984
年)により次のようにして測定した。ポリハイドロキシ
エチル・アスパルアミド・カラム[ポリエルシー(PolyL
C)社製。直径4.6mm及び長さ200mm]を用い、
20mM塩化ナトリウム、50mMぎ酸により溶出速度
0.4ml/分で溶出した。検出はUV検出器を用い、
データ解析はGPC分析システム(島津製作所製)を使
用した。
Next, the present invention will be described in detail with reference to test examples.
In the test examples of the present invention, the following test methods were employed. (1) Method for measuring molecular weight High-performance liquid chromatography (Edited by Nobuo Ui et al., “High-Performance Liquid Chromatography of Proteins and Peptides”, Chemical Special Issue No. 102, p. 241, Chemistry Dojin, 1984)
Year) was measured as follows. Polyhydroxyethyl asparamide column [PolyLc (PolyL
C). 4.6 mm in diameter and 200 mm in length]
Elution was performed with 20 mM sodium chloride and 50 mM formic acid at an elution rate of 0.4 ml / min. The detection uses a UV detector,
For data analysis, a GPC analysis system (manufactured by Shimadzu Corporation) was used.

【0032】(2)抗原残存活性の測定方法ELISA抑制 試験法(日本小児アレルギー学会誌、第
1巻、第36ページ、1978年)により次のようにし
て測定した。96穴プレート(ヌンク社製)に乳清蛋白
質をコーティングし、洗浄し、ウサギ抗乳清蛋白質血清
及び加水分解物試料の混合液をプレートの穴に供給して
反応させ、洗浄後アルカリホスファターゼ標識ヤギ抗ウ
サギIgG抗体(ザイメッド・ラボラトリー社製)を反
応させ、洗浄後p−ニトロフェニル・リン酸ナトリウム
を添加し、30分後に5N水酸化ナトリウムを添加して
反応を停止させ、反応生成物をマイクロプレートリーダ
ー(和光純薬工業社製)で測定した。なお、抑制用被検
抗原液添加による反応抑制の程度の表現には次の式で算
出した抑制率を用いた。 抑制率(%)=(1−被検抗原液での吸光度/対照の吸光度)×100 ただし、被検抗原液の吸光度及び対照の吸光度は抗乳清
蛋白血清にそれぞれ等量の被検試料液又は希釈液の混合
液を入れた穴の反応後測定した値である。
(2) Method of Measuring Remaining Activity of Antigen It was measured as follows by the ELISA inhibition test method (Japanese Journal of Pediatric Allergy, Vol. 1, p. 36, 1978). A 96-well plate (manufactured by Nunc) is coated with whey protein, washed, and a mixture of rabbit anti-whey protein serum and a hydrolyzate sample is supplied to the plate for reaction, washed, and washed with alkaline phosphatase-labeled goat. After reaction with an anti-rabbit IgG antibody (manufactured by Zymed Laboratory), washing was performed, p-nitrophenyl sodium phosphate was added, and 30 minutes later, 5N sodium hydroxide was added to stop the reaction. The measurement was performed using a plate reader (manufactured by Wako Pure Chemical Industries, Ltd.). In addition, the expression of the degree of reaction suppression by the addition of the test antigen solution for suppression used the suppression rate calculated by the following equation. Inhibition rate (%) = (1−absorbance of test antigen solution / absorbance of control) × 100 where the absorbance of the test antigen solution and the absorbance of the control are equal to each other in the anti-whey protein serum. Alternatively, it is a value measured after the reaction in the hole in which the mixture of the diluent is put.

【0033】(3)アミノ酸組成の測定方法 トリプトファン、システイン及びメチオニン以外のアミ
ノ酸については、試料を6N塩酸で110℃、24時間
加水分解し、トリプトファンについては、水酸化バリウ
ムで110℃、22時間アルカリ分解し、システイン及
びメチオニンについては、過ぎ酸処理後6N塩酸で11
0℃、18時間加水分解し、それぞれアミノ酸分析機
(日立製作所製。835型)により分析し、アミノ酸の
質量を測定した。
(3) Method for measuring amino acid composition For amino acids other than tryptophan, cysteine and methionine, a sample is hydrolyzed with 6N hydrochloric acid at 110 ° C. for 24 hours. For tryptophan, barium hydroxide is used at 110 ° C. for 22 hours. Decomposes, and cysteine and methionine are treated with 6N hydrochloric acid after treatment with post-acid to obtain 11
0 ° C., 18 hours to hydrolyze, and analyzed by each amino acid analyzer (Hitachi, Ltd. .835 inch), the mass was measured amino acid.

【0034】(4)遊離アミノ酸組成の測定方法 スルホサリチル酸で試料を除蛋白し、アミノ酸分析機
(日立製作所製。835型)により分析し、前記アミノ
酸組成の分析で得られた各アミノ酸の質量に対する遊離
アミノ酸質量の百分率を算出した。
(4) Method of Measuring Free Amino Acid Composition Samples were deproteinized with sulfosalicylic acid, and analyzed by an amino acid analyzer (Hitachi, Model 835). The percentage of free amino acid mass was calculated.

【0035】(5)遊離リジン含量の測定方法 リジン測定用酵素電極、20mML−リジン標準液、
0.1M燐酸L−リジン測定用緩衝液及び洗浄用界面活
性剤(いずれも旭化成工業社製)を用い、バイオテック
アナライザー(旭化成工業社製)により遊離リジン濃度
をバッチ式又はオンラインで測定し、乳清蛋白質のリジ
ン含有量に対する分解溶液の遊離リジン含有量から全リ
ジンに対する遊離リジンの量の割合を算出した。
(5) Method for measuring free lysine content Enzyme electrode for lysine measurement, 20 mM L-lysine standard solution,
Using a 0.1 M phosphate L-lysine measuring buffer and a detergent for washing (all manufactured by Asahi Kasei Kogyo Co., Ltd.), the concentration of free lysine was measured by a biotech analyzer (Asahi Kasei Kogyo Co., Ltd.) either batchwise or online, The ratio of the amount of free lysine to the total lysine was calculated from the free lysine content of the decomposition solution to the lysine content of whey protein.

【0036】(6)アンモニア含量の測定方法 スルホサリチル酸で試料を除蛋白し、アミノ酸分析機
(日立製作所製。835型)により分析し、アンモニア
の質量を測定した。
(6) Method for Measuring Ammonia Content The sample was deproteinized with sulfosalicylic acid and analyzed by an amino acid analyzer (Hitachi, Model 835) to determine the mass of ammonia.

【0037】(7)抗酸化作用の測定方法 リノール酸、β−カロチンをTween20で乳化し、
これに試料又は標品としてα−トコフェロールを添加
し、経時変化を比色法により測定した[フィトケミスト
リー(Phytochemistry)、第10巻、第1445ページ、
1971年]。リノール酸、β−カロチン、Tween
20、試料及びα−トコフェロールの最終濃度は、それ
ぞれ0.96mg/ml、4.8μg/ml、9.6m
g/ml、0.19mg/ml及び0.19mg/ml
であった。
(7) Method of measuring antioxidant action Linoleic acid and β-carotene are emulsified with Tween 20;
To this was added α-tocopherol as a sample or a sample, and the time-dependent change was measured by a colorimetric method [Phytochemistry, Vol. 10, p. 1445,
1971]. Linoleic acid, β-carotene, Tween
20, the final concentrations of the sample and α-tocopherol were 0.96 mg / ml, 4.8 μg / ml, 9.6 m, respectively.
g / ml, 0.19 mg / ml and 0.19 mg / ml
Met.

【0038】試験例1 この試験は、抗原性と密接に関連する高分子量画分の比
率を指標として、加水分解に供する乳清蛋白質溶液の好
適な濃度を調べるために行った。 1)試料の調製 表1に示すとおり乳清蛋白質濃度を変更したことを除
き、実施例1と同一の方法により乳清蛋白質溶液を加水
分解し、7種類の試料を調製した。
Test Example 1 This test was carried out to examine a suitable concentration of a whey protein solution to be subjected to hydrolysis, using a ratio of a high molecular weight fraction closely related to antigenicity as an index. 1) Preparation of Samples The whey protein solution was hydrolyzed in the same manner as in Example 1 except that the whey protein concentration was changed as shown in Table 1, and seven types of samples were prepared.

【0039】2)試験方法 分子量5,000〜10,000ダルトンの画分の比率
は前記分子量の測定方法により求めた。
2) Test method The ratio of the fraction having a molecular weight of 5,000 to 10,000 dalton was determined by the above-mentioned method for measuring the molecular weight.

【0040】3)試験結果 この試験結果は、表1に示すとおりである。表1から明
らかなように、分子量5,000〜10,000ダルト
ンの画分が1%未満となる乳清蛋白質の濃度は、15%
以下、望ましくは12%以下であることが判明した。反
応効率を考慮するならば、8〜12%が最も望ましい。
尚、乳清蛋白質の種類、バシラス・サチリス由来のエン
ドペプチダ−ゼ及び乳酸菌由来のエキソペプチダ−ゼの
種類、及び後記する試験例3において求められた範囲内
で、その酵素量を変更して試験したが、ほぼ同様の結果
が得られた。
3) Test results The test results are as shown in Table 1. As is clear from Table 1, the concentration of whey protein at which the fraction having a molecular weight of 5,000 to 10,000 daltons is less than 1% is 15%.
Below, it turned out that it is desirably 12% or less. Considering the reaction efficiency, 8 to 12% is most desirable.
The whey protein type, Bacillus subtilis-derived endopeptidase and lactic acid bacterium-derived exopeptidase, and within the range determined in Test Example 3 described below, the amount of the enzyme was changed and tested. , Almost the same result was obtained.

【0041】[0041]

【表1】 [Table 1]

【0042】試験例2 この試験は、抗原性を指標として、加水分解のために好
適な酵素処理初発pH範囲を調べるために行った。 1)試料の調製 加水分解の初発pHを次のとおり変更したことを除き、
実施例1と同一の方法により乳清蛋白質溶液を加水分解
し、5種類の試料を調製した。 試料1:初発pHをpH6.5に調整した後、加水分解
を行った。 試料2:初発pHをpH7.5に調整した後、加水分解
を行った。 試料3:初発pHをpH8.0に調整した後、加水分解
を行った。 試料4:初発pHをpH9.0に調整した後、加水分解
を行った。 試料5:初発pHをpH10.0に調整した後、加水分
解を行った。
Test Example 2 This test was conducted to examine the initial pH range of enzyme treatment suitable for hydrolysis using antigenicity as an index. 1) Preparation of sample Except that the initial pH of hydrolysis was changed as follows,
The whey protein solution was hydrolyzed in the same manner as in Example 1 to prepare five types of samples. Sample 1: After the initial pH was adjusted to pH 6.5, hydrolysis was performed. Sample 2: After the initial pH was adjusted to pH 7.5, hydrolysis was performed. Sample 3: After the initial pH was adjusted to pH 8.0, hydrolysis was performed. Sample 4: After the initial pH was adjusted to pH 9.0, hydrolysis was performed. Sample 5: After the initial pH was adjusted to pH 10.0, hydrolysis was performed.

【0043】2)試験方法 抗原残存活性は、前記抗原残存活性の測定方法により測
定した。
2) Test method The residual antigen activity was measured by the above-mentioned method for measuring the residual antigen activity.

【0044】3)試験結果 この試験結果は、表2に示すとおりである。表2から明
らかなように、低い抗原性の乳清蛋白加水分解物を得る
ためには、加水分解のための初発pHは7.5〜10.
0、望ましくは8〜9であることが判明した。尚、乳清
蛋白質の種類、バシラス・サチリス由来のエンドペプチ
ダ−ゼ及び乳酸菌由来のエキソペプチダ−ゼの種類、及
び後記する試験例3において求められた範囲内で、その
酵素量を変更して試験したが、ほぼ同様の結果が得られ
た。
3) Test results The test results are as shown in Table 2. As is clear from Table 2, in order to obtain a whey protein hydrolyzate having low antigenicity, the initial pH for hydrolysis is 7.5 to 10.
It turned out to be 0, preferably 8-9. The whey protein type, Bacillus subtilis-derived endopeptidase and lactic acid bacterium-derived exopeptidase, and within the range determined in Test Example 3 described below, the amount of the enzyme was changed and tested. , Almost the same result was obtained.

【0045】[0045]

【表2】 [Table 2]

【0046】試験例3 この試験は、抗原性と密接に関連する高分子量画分の比
率、アンモニア含量、及び抗酸化活性を指標として、酵
素の適正な使用量を調べるために行った。 1)試料の調製 表3に示すように酵素の使用量を変更したことを除き、
実施例1と同一の方法により乳清蛋白質溶液を加水分解
し、12種類の試料を調製した。なお、試料番号1及び
7は、30時間加水分解を行っても遊離リジン量が、1
4%に到達しなかったので、その時点で加水分解を終了
した。
Test Example 3 This test was conducted to determine the appropriate amount of enzyme to be used based on the ratio of high molecular weight fraction closely related to antigenicity, ammonia content, and antioxidant activity. 1) Sample preparation Except that the amount of enzyme used was changed as shown in Table 3,
The whey protein solution was hydrolyzed in the same manner as in Example 1 to prepare 12 kinds of samples. Sample Nos. 1 and 7 showed that the amount of free lysine was 1 even after hydrolysis for 30 hours.
Hydrolysis was terminated at that point, as it did not reach 4%.

【0047】2)試験方法 分子量5,000〜10,000ダルトンの画分の比率
は前記分子量の測定方法、アンモニア含量は前記アンモ
ニア含量の測定方法、及び抗酸化活性は前記抗酸化作用
の測定方法により求めた。なお、試料の抗酸化活性は、
α−トコフェロ−ルの抗酸化活性に対する相対的な強さ
を指標として表わした。
2) Test method The ratio of the fraction having a molecular weight of 5,000 to 10,000 daltons is the method for measuring the molecular weight, the ammonia content is the method for measuring the ammonia content, and the antioxidant activity is the method for measuring the antioxidant effect. Determined by The antioxidant activity of the sample
The relative strength of α-tocopherol to the antioxidant activity was shown as an index.

【0048】3)試験結果 この試験結果は、表3に示すとおりである。表3から明
らかなように、分子量5,000〜10,000ダルト
ンの画分が1%以下、アンモニア含量が0.2%以下、
かつα−トコフェロ−ルと同等又はそれ以上の抗酸化活
性となる酵素の使用量は、乳清蛋白質1gあたりバシラ
ス・サチリス由来のエンドペプチダーゼが1,000〜
7,500PUN単位、望ましくは2,000〜3,0
00PUN単位、乳酸菌由来のエキソペプチダーゼが2
0〜200活性単位、望ましくは60〜90活性単位の
範囲であることが判明した。尚、乳清蛋白質の種類、及
びバシラス・サチリス由来のエンドペプチダ−ゼ及び乳
酸菌由来のエキソペプチダ−ゼの種類を変更して試験し
たが、ほぼ同様の結果が得られた。
3) Test results The test results are as shown in Table 3. As is apparent from Table 3, the fraction having a molecular weight of 5,000 to 10,000 daltons is 1% or less, the ammonia content is 0.2% or less,
The amount of the enzyme having an antioxidant activity equal to or higher than that of α-tocopherol is from 1,000 to 1,000 g / m whey protein of endopeptidase derived from Bacillus subtilis.
7,500 PUN units, preferably 2,000 to 3,0
00PUN units, 2 exopeptidases from lactic acid bacteria
It has been found to be in the range of 0 to 200 activity units, preferably 60 to 90 activity units. The test was conducted by changing the type of whey protein and the type of endopeptidase derived from Bacillus subtilis and the type of exopeptidase derived from lactic acid bacteria, and almost the same results were obtained.

【0049】[0049]

【表3】 [Table 3]

【0050】試験例4 この試験は、風味、抗原性と密接に関連する高分子量画
分の比率、及び風味に影響を及ぼす遊離アミノ酸の含量
を指標として、加水分解物の適正なリジンの遊離率を調
べるために行った。 1)試料の調製 表4に示すとおり、加水分解反応を、所望の遊離リジン
の量の割合で、適宜、酵素を失活させて停止させたこと
を除き、実施例1と同一の方法により7種類の試料を調
製した。
Test Example 4 In this test, the appropriate lysine release rate of the hydrolyzate was determined by using, as an index, the ratio of the high molecular weight fraction closely related to flavor, antigenicity, and the content of free amino acids affecting flavor. Went to find out. 1) Preparation of sample As shown in Table 4, the hydrolysis reaction was carried out in the same manner as in Example 1 except that the enzyme was appropriately inactivated and stopped at the desired amount of free lysine. Different types of samples were prepared.

【0051】2)試験方法 分子量5,000〜10,000ダルトンの画分の比率
及び遊離アミノ酸の含量は、いずれも前記の方法により
求めた。なお、風味は下記の方法により試験した。 a)風味試験 男女各10名のパネルにより官能的に試験し、風味良
(0点)から風味不良(3点)までの4段階に評価し、
評価点の平均値から、0.5点未満を良、0.5点以上
〜1.5点未満をやや良、1.5点以上〜2.5点未満
をやや不良及び2.5点以上〜3.0点未満を不良と判
定した。
2) Test method The ratio of the fraction having a molecular weight of 5,000 to 10,000 dalton and the content of free amino acid were determined by the above-mentioned methods. The flavor was tested by the following method. a) Flavor test Sensory test is conducted sensuously by a panel of 10 men and women, and evaluated on a 4-point scale from good taste (0 points) to bad taste (3 points),
From the average value of the evaluation points, less than 0.5 points are good, 0.5 points or more and less than 1.5 points are slightly good, and 1.5 points or more and less than 2.5 points are somewhat poor and 2.5 points or more. A score of less than .about.3.0 was judged to be defective.

【0052】3)試験結果 この試験の結果は、表4に示すとおりである。表4から
明らかなように風味が良い乳清蛋白質分解物は、リジン
の遊離率が12〜20%、望ましくは14〜17%であ
ることが判明した。尚、乳清蛋白質の種類、バシラス・
サチリス由来のエンドペプチダ−ゼ及び乳酸菌由来のエ
キソペプチダ−ゼの種類、及び前記する試験例3におい
て求められた範囲内で、その酵素量を変更して試験した
が、ほぼ同様の結果が得られた。
3) Test results The results of this test are as shown in Table 4. As is clear from Table 4, the whey protein hydrolyzate having a good taste has a lysine release rate of 12 to 20%, preferably 14 to 17%. The type of whey protein, Bacillus
Tests were carried out with the amount of the enzyme changed within the range determined in Test Example 3 as well as the types of endopeptidase derived from Sachiris and exopeptidase derived from lactic acid bacteria, and almost the same results were obtained.

【0053】[0053]

【表4】 [Table 4]

【0054】試験例5 この試験は、抗原性と密接に関連する高分子量画分の比
率、抗原性、食品素材として好適な性質である透明性の
基準となる透過率及び熱安定性を指標として、加水分解
物の好適な瀘過方法を調べるために行った。 1)試料の調製 表5に示すとおり瀘過膜(分画分子量)を変更したこと
を除き、実施例1と同一の方法により乳清蛋白質溶液を
加水分解し、3種類の試料を調製した。なお、瀘過膜と
して、旭化成工業社製の分画分子量3,000ダルトン
及び10,000ダルトンの限外瀘過膜、及び孔径0.
25μm の精密瀘過膜を使用した。
Test Example 5 In this test, the ratio of the high molecular weight fraction closely related to the antigenicity, the antigenicity, the transmittance as a reference for transparency, which is a property suitable as a food material, and the thermal stability were used as indices. This was performed to determine a suitable filtration method for the hydrolyzate. 1) Preparation of samples Three kinds of samples were prepared by hydrolyzing a whey protein solution in the same manner as in Example 1 except that the filtration membrane (fraction molecular weight) was changed as shown in Table 5. As the filtration membrane, an ultrafiltration membrane having a molecular weight cutoff of 3,000 daltons and 10,000 daltons manufactured by Asahi Kasei Kogyo Co., Ltd., and a pore size of 0.1.
A 25 μm microfiltration membrane was used.

【0055】2)試験方法 分子量5,000〜10,000ダルトンの画分の比
率、抗原残存活性、透過率、及び熱安定性は、いずれも
前記の方法により求めた。
2) Test Method The ratio of the fraction having a molecular weight of 5,000 to 10,000 dalton, the residual antigen activity, the transmittance, and the thermal stability were all determined by the above-mentioned methods.

【0056】3)試験結果 この試験の結果は、表5に示すとおりである。表5から
明らかなように、分子量5,000〜10,000ダル
トンの画分が1%未満、透過率が98%以上、耐熱性を
有する限外濾過処理方法は、クエン酸でpHを5.5〜
7に調整し、分画分子量10,000以下、望ましくは
3,000以下、の限外濾過膜を用いることが必要であ
ることが判明した。尚、乳清蛋白質の種類、バシラス・
サチリス由来のエンドペプチダ−ゼ及び乳酸菌由来のエ
キソペプチダ−ゼの種類、及び前記する試験例3におい
て求められた範囲内で、その酵素量を変更して試験した
が、ほぼ同様の結果が得られた。
3) Test results The results of this test are as shown in Table 5. As is clear from Table 5, the ultrafiltration method having a fraction having a molecular weight of 5,000 to 10,000 daltons of less than 1%, a transmittance of 98% or more, and heat resistance is performed using citric acid to adjust the pH to 5. 5-
7, it was found necessary to use an ultrafiltration membrane having a molecular weight cut-off of 10,000 or less, preferably 3,000 or less. The type of whey protein, Bacillus
Tests were carried out with the amount of the enzyme changed within the range determined in Test Example 3 as well as the types of endopeptidase derived from Sachiris and exopeptidase derived from lactic acid bacteria, and almost the same results were obtained.

【0057】[0057]

【表5】 [Table 5]

【0058】試験例6 この試験は、風味と抗酸化活性を指標として、加水分解
のために好適な酵素の種類を調べるために行った。 1)試料の調製 表6に示すとおり使用する酵素の種類及び添加量を変更
したことを除き、実施例1と同一の方法により6種類の
試料を調製した。なお、酵素としては、バシラス・サチ
リス由来のエンドペプチダーゼとして、ビオプラーゼ
6.0S(長瀬生化学工業社製)、乳酸菌由来のエキソ
ペプチダーゼとして、後記する参考例1と同様の方法で
調製したラクトバシラス・ヘルベティカス菌体破砕物又
はビフィドバクテリウム・ブレーベ菌体破砕物、その他
のエンドペプチダーゼとして、トリプシン(ノボノルデ
ィスク社製)、及ひその他のエキソペプチダーゼとし
て、デナチームAP(長瀬産業社製)を用いた。また、
試料番号1及び2は、30時間加水分解を行っても遊離
リジン量が、14%に達しなかったので、その時点で加
水分解を終了した。
Test Example 6 This test was conducted to examine the types of enzymes suitable for hydrolysis using the flavor and antioxidant activity as indices. 1) Preparation of Samples Six types of samples were prepared in the same manner as in Example 1 except that the types and amounts of enzymes used were changed as shown in Table 6. In addition, as an enzyme, biopulase 6.0S (manufactured by Nagase Biochemical Co., Ltd.) as endopeptidase derived from Bacillus subtilis, and exopeptidase derived from lactic acid bacterium in the same manner as in Reference Example 1 described later.
Lactobacillus helveticus disrupted cells were prepared or Bifidobacterium breve disrupted cells, as other endopeptidase, trypsin (manufactured by Novo Nordisk), as及Hi other exopeptidase, Denachimu AP (Nagase Co. Was used. Also,
In Sample Nos. 1 and 2, the amount of free lysine did not reach 14% even after hydrolysis for 30 hours, so the hydrolysis was terminated at that point.

【0059】2)試験方法 風味及び抗酸化活性は、いずれも前記の方法により求め
た。
2) Test method Both the flavor and the antioxidant activity were determined by the methods described above.

【0060】3)試験結果 この試験の結果は、表6に示すとおりである。表6から
明らかなように風味が良くかつα−トコフェロールと同
等又はそれ以上の抗酸化活性を有する乳清蛋白質分解物
は、バシラス・サチリス由来のエンドペプチダーゼ及び
乳酸菌由来のエキソペプチダーゼの2種類の蛋白分解酵
素で加水分解したものであることが判明した。尚、乳清
蛋白質の種類、酵素の種類及び量を変更(バシラス・サ
チリス由来のエンドペプチダ−ゼ及び乳酸菌由来のエキ
ソペプチダ−ゼについては、前記する試験例3において
求められた範囲内で、その酵素量を変更)して試験した
が、ほぼ同様の結果が得られた。
3) Test results The results of this test are as shown in Table 6. As is clear from Table 6, whey protein hydrolyzate having a good taste and an antioxidant activity equal to or higher than that of α-tocopherol is composed of two kinds of proteins, endopeptidase derived from Bacillus subtilis and exopeptidase derived from lactic acid bacteria. It was found that it was hydrolyzed with a degrading enzyme. The type of whey protein and the type and amount of the enzyme were changed (for the endopeptidase derived from Bacillus subtilis and the exopeptidase derived from lactic acid bacteria, the amount of the enzyme within the range determined in Test Example 3 described above). Was changed), and almost the same results were obtained.

【0061】[0061]

【表6】 [Table 6]

【0062】参考例1 コーンスティープリカー20部(重量。以下同じ)に水
道水100部及び石灰5部を添加し、コーンスティープ
リカーに含まれている酸を中和し、濾過助剤としてセラ
イト50部を添加して濾過し、濾液Aを得た。これとは
別に、フィシュリバー20部、モラセス35部及び水道
水200部の混合液にセライト50部を添加して濾過
し、濾液Bを得た。
REFERENCE EXAMPLE 1 100 parts of tap water and 5 parts of lime were added to 20 parts (weight; the same applies hereinafter) of corn steep liquor to neutralize the acid contained in the corn steep liquor, and Celite 50 was used as a filter aid. The filtrate was added to the mixture and filtered to obtain a filtrate A. Separately, 50 parts of celite was added to a mixture of 20 parts of fish river, 35 parts of molasses and 200 parts of tap water, followed by filtration to obtain a filtrate B.

【0063】前記濾液A及び濾液Bの当量混合液500
部にグルコース5部、リン酸一カリウム2.5部、リン
酸二カリウム2.5部及び酢酸ナトリウム5部を添加
し、30%水酸化ナトリウムでpHを6.4に調整し、
水を添加して1000部に調整した。
Equivalent mixture 500 of the above-mentioned filtrate A and filtrate B
5 parts of glucose, 2.5 parts of monopotassium phosphate, 2.5 parts of dipotassium phosphate and 5 parts of sodium acetate were added to the mixture, and the pH was adjusted to 6.4 with 30% sodium hydroxide.
Water was added to adjust to 1000 parts.

【0064】滅菌した前記組成の培地10リッターに
酸菌ラクトバシラス・ヘルベティカスを培養し、得られ
た培養液を遠心分離して乳酸菌菌体を回収し、滅菌水に
菌体を懸濁し、遠心分離して乳酸菌菌体を回収する操作
を2回反復して菌体を洗浄し、のち20%の濃度で菌体
を滅菌水に懸濁し、超音波破砕機(ブランソン社製。S
ONIFIER model250)により菌体を破砕
し、凍結乾燥し、乳酸菌由来のエキソペプチダーゼ粉末
約25gを得た。
Milk was added to 10 liters of sterilized medium having the above composition.
The procedure of culturing the acid bacterium Lactobacillus helveticus, centrifuging the resulting culture to collect the lactic acid bacteria cells, suspending the cells in sterile water, centrifuging and collecting the lactic acid bacteria cells is repeated twice. After washing the cells, the cells were suspended in sterilized water at a concentration of 20%, and then an ultrasonic crusher (manufactured by Branson Co., S.)
The cells were disrupted by ONIFIER model 250) and freeze-dried to obtain about 25 g of lactic acid bacteria-derived exopeptidase powder.

【0065】参考例2 実施例2と同一の方法で得た乳清蛋白加水分解物(蛋白
質等量79.4%)25.0kgを水140kgに溶解
し、5kgの水に溶解した所定量のミネラル類を加え、
60℃に加熱し、DHA70gを含む植物性脂肪2.0
kg、マルツデキストリン65.1kg、砂糖6.6k
g及び所定量のビタミン類を混合し、この混合液を高圧
均質機で十分均質化し、120℃で2秒間殺菌し、噴霧
乾燥し、粉末状の抗アレルギー性組成物約99kgを得
た。
Reference Example 2 25.0 kg of a whey protein hydrolyzate (protein equivalent: 79.4%) obtained by the same method as in Example 2 was dissolved in 140 kg of water, and a predetermined amount of water dissolved in 5 kg of water was dissolved. Add minerals,
Heated to 60 ° C., vegetable fat 2.0 g containing DHA 70 g
kg, malt dextrin 65.1 kg, sugar 6.6 k
g and a predetermined amount of vitamins were mixed, the mixture was sufficiently homogenized with a high-pressure homogenizer, sterilized at 120 ° C. for 2 seconds, and spray-dried to obtain about 99 kg of a powdery antiallergic composition.

【0066】次に実施例を示して本発明を更に詳述する
が、本発明は以下の実施例に限定されるものではない。
Now, the present invention will be described in further detail with reference to Examples. However, it should be understood that the present invention is by no means restricted to such specific Examples.

【実施例】実施例1 純度75%の乳清蛋白質粉末(カリフォルニア・プロテ
イン社製)1kgを、脱イオン水9kgに溶解し、75
℃に15秒間保持して殺菌し、pHを9.0に調整し、
プロテアーゼNアマノ(天野製薬社製)180万PUN
単位(乳清蛋白質1g当たり2400PUN単位)及び
前記参考例1と同一の方法で調製したラクトバシラス
ヘルベティカス菌体破砕物6.8万活性単位(乳清蛋白
質1g当たり90活性単位)を添加し、50℃に保持し
て加水分解し、バイオテックアナライザー(旭化成工業
社製)を用いて経時的に遊離リジンの量を測定し、遊離
リジン量が14%に達した時点で、80℃で6分間加熱
して酵素を失活させ、冷却し、のちクエン酸でpHを
6.0に調整し、分画分子量10,000の限外濾過膜
(日東電工社製)で限外濾過し、乳清蛋白質加水分解物
を5.9%含有する溶液約16kgを得た。
EXAMPLE 1 1 kg of 75% pure whey protein powder (California Protein) was dissolved in 9 kg of deionized water.
C. for 15 seconds to sterilize, adjust the pH to 9.0,
Protease N Amano (Amano Pharmaceutical) 1.8 million PUN
Units (2,400 PUN units per gram of whey protein) and Lactobacillus prepared by the same method as in Reference Example 1.
Add 68,000 activity units (90 activity units per 1 g of whey protein) of the disrupted Helveticus cells, hydrolyze at 50 ° C., and use a Biotech Analyzer (manufactured by Asahi Chemical Industry Co., Ltd.) over time. The amount of free lysine was measured, and when the amount of free lysine reached 14%, the enzyme was inactivated by heating at 80 ° C. for 6 minutes, cooled, and then adjusted to pH 6.0 with citric acid, Ultrafiltration was performed using an ultrafiltration membrane having a molecular weight cutoff of 10,000 (manufactured by Nitto Denko Corporation) to obtain about 16 kg of a solution containing 5.9% of whey protein hydrolyzate.

【0067】得られた乳清蛋白質加水分解物を前記試験
方法により試験した結果の一部を図1、図2及び図3に
示す。これらの結果、乳清蛋白質加水分解物は、分子量
5,000〜10,000ダルトンの画分が、全加水分
解物の0.3%、抗原残存活性が10-6以下、リジンの
遊離率が14%、遊離アミノ酸含量11%、アンモニア
含有量が0.07%、10%溶液の透過率が98%、5
%溶液のpH未調整及びpH4における120℃、10
分間の加熱にも安定であり、α−トコフェロ−ルと同等
の抗酸化活性を有した。また、前記試験方法により試験
したアミノ酸組成(乳清蛋白加水分解物1g当たり)は
次のとおりであった。
Some of the results obtained by testing the obtained whey protein hydrolyzate according to the test method are shown in FIGS. 1, 2 and 3. As a result, the whey protein hydrolyzate contained a fraction having a molecular weight of 5,000 to 10,000 daltons, 0.3% of the total hydrolyzate, an antigen residual activity of 10 -6 or less, and a lysine release rate of less than 10 -6. 14%, free amino acid content 11%, ammonia content 0.07%, 10% solution transmittance 98%, 5%
% Solution not adjusted and 120 ° C, 10 at pH4
It was stable even after heating for 1 minute, and had antioxidant activity equivalent to that of α-tocopherol. The amino acid composition (per 1 g of whey protein hydrolyzate) tested by the above test method was as follows.

【0068】 L−アラニン 52.8(mg) L−アルギニン 23.4 L−アスパラギン酸(L−アスパラギンを含む)102.6 L−システイン 17.1 L−グルタミン酸(L−グルタミンを含む) 185.1 L−グリシン 18.8 L−ヒスチジン 17.7 L−イソロイシン 59.9 L−ロイシン 100.1 L−リジン 94.6 L−メチオニン 15.8 L−フェニルアラニン 29.5 L−プロリン 61.4 L−セリン 49.2 L−スレオニン 70.3 L−トリプトファン 16.7 L−チロシン 26.1 L−バリン 54.7L-alanine 52.8 (mg) L-arginine 23.4 L-aspartic acid (including L-asparagine) 102.6 L-cysteine 17.1 L-glutamic acid (including L-glutamine) 188.5. 1 L-glycine 18.8 L-histidine 17.7 L-isoleucine 59.9 L-leucine 100.1 L-lysine 94.6 L-methionine 15.8 L-phenylalanine 29.5 L-proline 61.4 L -Serine 49.2 L-threonine 70.3 L-tryptophan 16.7 L-tyrosine 26.1 L-valine 54.7

【0069】実施例2 純度85%の乳清蛋白質粉末(デンマーク・プロテイン
社製)1kgを、脱イオン水19kgに溶解し、pHを
10に調整し、市販のトリプシン(ノボノルディスク社
製)を11万PUN単位(乳清蛋白質1g当たり130
PUN単位)、プロテアーゼNアマノ(天野製薬社製)
180万PUN単位(乳清蛋白質1g当たり2100P
UN単位)及び前記参考例1と同様の方法で調製した
クトバシラス・プルガリカス菌体破砕物5.1万活性単
位(乳清蛋白質1g当たり60活性単位)を添加し、4
0℃で加水分解し、バイオテックアナライザー(旭化成
工業社製)を用いて経時的に遊離リジンの量を測定し、
遊離リジン量が17%に達した時点で、130℃で2秒
間加熱して酵素を失活させ、冷却し、のちクエン酸でp
Hを6.5に調整し、分画分子量3,000の限外濾過
膜(旭化成工業社製)で限外濾過し、濃縮し、噴霧乾燥
し、粉末状の乳清蛋白質加水分解物約800gを得た。
Example 2 1 kg of 85% pure whey protein powder (produced by Protein, Denmark) was dissolved in 19 kg of deionized water, the pH was adjusted to 10, and commercially available trypsin (produced by Novo Nordisk) was added. 110,000 PUN units (130 per gram of whey protein)
PUN unit), Protease N Amano (Amano Pharmaceutical Co., Ltd.)
1.8 million PUN units (2100P / g of whey protein)
La prepared by UN units) and Reference Example 1 In the same manner as
Added 51,000 active units (60 active units per gram of whey protein) of the disrupted C.bacillus pulgaricus cells,
Hydrolyze at 0 ° C., measure the amount of free lysine with time using a Biotech Analyzer (manufactured by Asahi Kasei Corporation),
When the amount of free lysine reached 17%, the enzyme was deactivated by heating at 130 ° C. for 2 seconds, cooled, and then added with citric acid.
H was adjusted to 6.5, ultrafiltered with an ultrafiltration membrane with a cut-off molecular weight of 3,000 (manufactured by Asahi Kasei Kogyo Co., Ltd.), concentrated, spray-dried, and about 800 g of a powdery whey protein hydrolyzate I got

【0070】得られた乳清蛋白質加水分解物を前記の試
験方法により試験した結果、分子量5,000〜10,
000ダルトンの画分が、全加水分解物の0.2%、抗
原残存活性が10-6以下、リジンの遊離率が17%、遊
離アミノ酸含量13%、アンモニア含有量が0.04
%、10%溶液の透過率が99%、5%溶液のpH未調
整及びpH4における120℃、10分間の加熱にも安
定であり、α−トコフェロ−ルと同等の抗酸化活性を有
した。
The whey protein hydrolyzate obtained was tested according to the test method described above.
The 000 dalton fraction is 0.2% of the total hydrolyzate, has an antigen remaining activity of 10 -6 or less, has a lysine release rate of 17%, a free amino acid content of 13%, and an ammonia content of 0.04.
%, The transmittance of the 10% solution was 99%, the pH of the 5% solution was not adjusted, and the solution was stable even at pH 4 at 120 ° C. for 10 minutes, and had the same antioxidant activity as α-tocopherol.

【0071】実施例3 純度90%の乳清蛋白質粉末(バイオポール社製)1k
gを、脱イオン水19kgに溶解し、75℃に15秒間
保持して殺菌し、pHを8.0に調整し、市販のパパイ
ン(天野製薬社製)を10万PUN単位(乳清蛋白質1
g当たり110PUN単位)、ニュートラーゼ(ノボノ
ルディスク社製)220万PUN単位(乳清蛋白質1g
当たり2400PUN単位)及び前記参考例1と同様の
方法で調製したビフィドバクテリウム・ブレーベ菌体破
砕物9万活性単位(乳清蛋白質1g当たり100活性単
位)を添加し、50℃に保持して加水分解し、バイオテ
ックアナライザー(旭化成工業社製)を用いて経時的に
遊離リジンの量を測定し、遊離リジン量が20%に達し
た時点で、85℃で15分間加熱して酵素を失活させ、
冷却し、のちクエン酸でpHを7.0に調整し、分画分
子量10,000の限外濾過膜(日東電工社製)で限外
濾過し、濃縮し、噴霧乾燥し、粉末状の乳清蛋白質加水
分解物約800gを得た。
Example 3 1k whey protein powder with 90% purity (manufactured by Biopol)
g was dissolved in 19 kg of deionized water, sterilized by maintaining at 75 ° C. for 15 seconds, the pH was adjusted to 8.0, and commercially available papain (manufactured by Amano Pharmaceutical Co., Ltd.) was prepared in 100,000 PUN units (whey protein 1).
110 PUN units per g), Neutrase (Novo Nordisk) 2.2 million PUN units (1 g whey protein)
Per unit of 2400 PUN) and 90,000 activity units of the crushed Bifidobacterium breve cells prepared in the same manner as in Reference Example 1 (100 activity units per gram of whey protein). After hydrolysis, the amount of free lysine was measured over time using a Biotech Analyzer (manufactured by Asahi Kasei Kogyo). When the amount of free lysine reached 20%, the enzyme was lost by heating at 85 ° C. for 15 minutes. Alive,
After cooling, the pH was adjusted to 7.0 with citric acid, ultrafiltered with an ultrafiltration membrane (Nitto Denko Corporation) having a molecular weight cut off of 10,000, concentrated, spray-dried, and powdered milk. About 800 g of hydrolyzed protein was obtained.

【0072】得られた乳清蛋白質加水分解物を前記試験
方法により試験した結果、分子量5,000〜10,0
00ダルトンの画分が、全加水分解物の0.3%、抗原
残存活性が10-6以下、リジンの遊離率が20%、遊離
アミノ酸含量15%、アンモニア含有量が0.09%、
10%溶液の透過率が98%、5%溶液のpH未調整及
びpH4における120℃、10分間の加熱にも安定で
あり、α−トコフェロ−ルと同等の抗酸化活性を有し
た。
The obtained whey protein hydrolyzate was tested according to the test method described above, and it was found that the molecular weight was 5,000 to 10,000.
00 dalton fraction is 0.3% of the total hydrolyzate, remaining antigen activity is 10 -6 or less, lysine release rate is 20%, free amino acid content is 15%, ammonia content is 0.09%,
The transmittance of the 10% solution was 98%, the pH was not adjusted for the 5% solution, and the solution was stable even when heated at 120 ° C. for 10 minutes at pH 4, and had the same antioxidant activity as α-tocopherol.

【0073】実施例4 純度70%の乳清蛋白質粉末(ミライ社製)1kgを、
脱イオン水5.7kgに溶解し、pHを9.0に調整
し、ビオプラーゼ6.0S(長瀬生化学工業社製)16
0万PUN単位(乳清蛋白質1g当たり2000PUN
単位)及び前記参考例1と同様の方法で調製したストレ
プトコッカス・ラクチス菌体破砕物6.3万活性単位
(乳清蛋白質1g当たり90活性単位)を添加し、45
℃で加水分解し、バイオテックアナライザー(旭化成工
業社製)を用いて経時的に遊離リジンの量を測定し、遊
離リジン量が19%に達した時点で、130℃で2秒間
加熱して酵素を失活させ、冷却し、のちクエン酸でpH
を7.0に調整し、分画分子量10,000の限外濾過
膜(旭化成社製)で限外濾過し、乳清蛋白質加水分解物
を8.4%含有する溶液約11kgを得た。
Example 4 1 kg of whey protein powder having a purity of 70% (manufactured by Mirai Co., Ltd.)
It is dissolved in 5.7 kg of deionized water, the pH is adjusted to 9.0, and bioprase 6.0S (manufactured by Nagase Seikagaku Corporation) 16
100,000 PUN units (2000 PUN per gram of whey protein)
Units) and 63,000 activity units (90 activity units per gram of whey protein) of the disrupted Streptococcus lactis cells prepared in the same manner as in Reference Example 1 above.
The amount of free lysine was measured over time using a Biotech Analyzer (manufactured by Asahi Kasei Kogyo Co., Ltd.), and when the amount of free lysine reached 19%, the enzyme was heated at 130 ° C. for 2 seconds. Quenched, then cooled with citric acid to pH
Was adjusted to 7.0 and subjected to ultrafiltration with an ultrafiltration membrane having a cut-off molecular weight of 10,000 (manufactured by Asahi Kasei Corporation) to obtain about 11 kg of a solution containing 8.4% of whey protein hydrolyzate.

【0074】得られた乳清蛋白質加水分解物を前記の試
験方法により試験した結果、分子量5,000〜10,
000ダルトンの画分が、全加水分解物の0.9%、抗
原残存活性が10-6以下、リジンの遊離率が19%、遊
離アミノ酸含量14.5%、アンモニア含有量が0.1
0%、10%溶液の透過率が98%、5%溶液のpH未
調整及びpH4における120℃、10分間の加熱にも
安定であり、α−トコフェロ−ルと同等の抗酸化活性を
有した。
The obtained whey protein hydrolyzate was tested according to the test method described above.
The 000 dalton fraction is 0.9% of the total hydrolyzate, the residual antigen activity is 10 -6 or less, the lysine release rate is 19%, the free amino acid content is 14.5%, and the ammonia content is 0.1.
The transmittance of the 0% and 10% solutions was 98%, the pH of the 5% solution was not adjusted, and the solution was stable even when heated at 120 ° C. and 10 minutes at pH 4, and had the same antioxidant activity as α-tocopherol. .

【0075】実施例5 純度80%の乳清蛋白質粉末(ニュージーランド・デー
リー・ボード製)1kgを、脱イオン水12.3kgに
溶解し、75℃に15秒間保持して殺菌し、pHを8.
5に調整し、市販のパパイン(天野製薬社製)を8万P
UN単位(乳清蛋白質1g当たり100PUN単位)、
ビオプラーゼ(長瀬生化学工業社製)220万PUN単
位(乳清蛋白質1g当たり2700PUN単位)及び前
記参考例1と同様の方法で調製したストレプトコッカス
・クレモリス菌体破砕物5.6万活性単位(乳清蛋白質
1g当たり70活性単位)を添加し、pHを6.5に保
持して55℃で加水分解し、バイオテックアナライザー
(旭化成工業社製)を用いて経時的に遊離リジンの量を
測定し、遊離リジン量が17%に達した時点で、90℃
で5分間加熱して酵素を失活させ、冷却し、のちクエン
酸でpHを5.5に調整し、分画分子量10,000の
限外濾過膜(日東電工社製)で限外濾過し、濃縮し、噴
霧乾燥し、粉末状の乳清蛋白質加水分解物約800gを
得た。
Example 5 1 kg of 80% pure whey protein powder (New Zealand Daily Board) was dissolved in 12.3 kg of deionized water, sterilized at 75 ° C. for 15 seconds and adjusted to pH 8.
5 and adjust the commercial papain (manufactured by Amano Pharmaceutical Co., Ltd.) to 80,000P
UN units (100 PUN units per gram of whey protein),
Biopulase (manufactured by Nagase Seikagaku Corporation) 2.2 million PUN units (2700 PUN units per 1 g of whey protein) and 56,000 active units of whey crushed Streptococcus cremoris cells prepared by the same method as in Reference Example 1 (whey) The protein was hydrolyzed at 55 ° C. while maintaining the pH at 6.5, and the amount of free lysine was measured over time using a Biotech Analyzer (manufactured by Asahi Chemical Industry Co., Ltd.). When the amount of free lysine reaches 17%, 90 ° C
For 5 minutes to inactivate the enzyme, cool the mixture, adjust the pH to 5.5 with citric acid, and perform ultrafiltration with an ultrafiltration membrane (Nitto Denko Corporation) having a molecular weight cutoff of 10,000. , Concentrated and spray-dried to obtain about 800 g of a powdery whey protein hydrolyzate.

【0076】得られた乳清蛋白質加水分解物を前記試験
方法により試験した結果、分子量5,000〜10,0
00ダルトンの画分が、全加水分解物の0.3%、抗原
残存活性が10-6以下、リジンの遊離率が17%、遊離
アミノ酸含量13%、アンモニア含有量が0.11%、
10%溶液の透過率が99%、5%溶液のpH未調整及
びpH4における120℃、10分間の加熱にも安定で
あり、α−トコフェロ−ルと同等の抗酸化活性を有し
た。
The obtained whey protein hydrolyzate was tested according to the test method described above, and it was found that the molecular weight was 5,000 to 10,000.
The 00 dalton fraction is 0.3% of the total hydrolyzate, has an antigen residual activity of 10 -6 or less, a lysine release rate of 17%, a free amino acid content of 13%, and an ammonia content of 0.11%.
The transmittance of the 10% solution was 99%, the pH was not adjusted for the 5% solution, and the solution was stable even when heated at 120 ° C. for 10 minutes at pH 4, and had the same antioxidant activity as α-tocopherol.

【0077】実施例6 純度70%の乳清蛋白質粉末(カリフォルニア・プロテ
イン社製)1kgを、脱イオン水7kgに溶解し、pH
を8.0に調整し、ブロメライン(天野製薬社製)35
万PUN単位(乳清蛋白質1g当たり500PUN単
位)、ニュートラーゼ(ノボノルディスク社製)230
万PUN単位(乳清蛋白質1g当たり3300PUN単
位)及び前記参考例1と同様の方法で調製したラクトバ
シラス・ブルガリカス菌体破砕物5.6万活性単位(乳
清蛋白質1g当たり80活性単位)を添加し、47℃で
加水分解し、バイオテックアナライザー(旭化成工業社
製)を用いて経時的に遊離リジンの量を測定し、遊離リ
ジン量が17%に達した時点で、85℃で15分間加熱
して酵素を失活させ、冷却し、のちクエン酸でpHを
5.5に調整し、分画分子量10,000の限外瀘過膜
(日東電工社製)で限外濾過し、濃縮し、噴霧乾燥し、
粉末状の乳清蛋白質加水分解物約800gを得た。
Example 6 1 kg of 70% pure whey protein powder (California Protein) was dissolved in 7 kg of deionized water and the pH was
Was adjusted to 8.0, and Bromelain (manufactured by Amano Pharmaceutical Co., Ltd.) 35
10,000 PUN units (500 PUN units per gram of whey protein), Neutrase (Novo Nordisk) 230
10,000 PUN units (3300 PUN units per 1 g of whey protein) and lactobacilla prepared in the same manner as in Reference Example 1.
56,000 activity units (80 activity units per 1 g of whey protein) of the crushed cells of Shirasu -bulgaricus were added, hydrolyzed at 47 ° C., and over time using a Biotech Analyzer (manufactured by Asahi Chemical Industry Co., Ltd.). The amount of free lysine was measured, and when the amount of free lysine reached 17%, the enzyme was inactivated by heating at 85 ° C. for 15 minutes, cooled, and then adjusted to pH 5.5 with citric acid, Ultrafiltration through an ultrafiltration membrane having a molecular weight cut off of 10,000 (manufactured by Nitto Denko Corporation), concentration, spray drying,
About 800 g of a powdery whey protein hydrolyzate was obtained.

【0078】得られた乳清蛋白質加水分解物を前記の試
験方法により試験した結果、分子量5,000〜10,
000ダルトンの画分が、全加水分解物の0.4%、抗
原残存活性が10-6以下、リジンの遊離率が17%、遊
離アミノ酸含量13%、アンモニア含有量が0.10
%、10%溶液の透過率が98%、5%溶液のpH未調
整及びpH4における120℃、10分間の加熱にも安
定であった。
The obtained whey protein hydrolyzate was tested according to the test method described above.
The 000 dalton fraction is 0.4% of the total hydrolyzate, has an antigen residual activity of 10 -6 or less, has a lysine release rate of 17%, a free amino acid content of 13%, and an ammonia content of 0.10.
%, The transmittance of the 10% solution was 98%, the pH was not adjusted for the 5% solution, and the solution was also stable when heated at 120 ° C. for 10 minutes at pH 4.

【0079】実施例7 純度80%の乳清蛋白質粉末(デンマーク・プロテイン
社製)1kgを、脱イオン水9kgに溶解し、pHを
7.5に調整し、市販のニュートラーゼ(ノボノルディ
スク社製)を160万PUN単位(乳清蛋白質1g当た
り2000PUN単位)及び前記参考例1と同様の方法
調製したビフィドバクテリウム・ブレーベ菌体破砕物
2.8万活性単位(乳清蛋白質1g当たり35活性単
位)を添加し、pH7.5に保持して45℃で加水分解
し、バイオテックアナライザー(旭化成工業社製)を用
いて経時的に遊離リジンの量を測定し、遊離リジン量が
12%に達した時点で、90℃で20分間加熱して酵素
を失活させ、冷却し、のちクエン酸でpHを7.0に調
整し、分画分子量3,000の限外濾過膜(旭化成社
製)で限外濾過し、濃縮し、噴霧乾燥し、粉末状の乳清
蛋白質加水分解物約800gを得た。
Example 7 1 kg of whey protein powder having a purity of 80% (produced by Protein, Denmark) was dissolved in 9 kg of deionized water, the pH was adjusted to 7.5, and commercially available Neutrase (manufactured by Novo Nordisk). Ltd.) 1.6 million PUN units (whey protein 1g per 2000PUN units) and the reference example 1 bi was prepared in a similar manner to Bifidobacterium breve disrupted cells 28,000 activity units (whey protein per 1g 35 activity units), and the mixture was hydrolyzed at 45 ° C. while maintaining the pH at 7.5, and the amount of free lysine was measured over time using a Biotech Analyzer (manufactured by Asahi Kasei Corporation). %, The mixture was heated at 90 ° C. for 20 minutes to inactivate the enzyme, cooled, then adjusted to pH 7.0 with citric acid, and ultrafiltered with a molecular weight cutoff of 3,000 (Asahi Kasei) Company )), Concentrated and spray-dried to obtain about 800 g of a powdery whey protein hydrolyzate.

【0080】得られた乳清蛋白質加水分解物を前記試験
方法により試験した結果、分子量5,000〜10,0
00ダルトンの画分が、全加水分解物の0.4%、抗原
残存活性が10-6以下、リジンの遊離率が12%、遊離
アミノ酸含量10%、アンモニア含有量が0.09%、
10%溶液の透過率が100%、5%溶液のpH未調整
及びpH4における120℃、10分間の加熱にも安定
であった。
The obtained whey protein hydrolyzate was tested according to the test method described above, and it was found that the molecular weight was 5,000 to 10,000.
The 00 dalton fraction is 0.4% of the total hydrolyzate, the residual antigen activity is 10 -6 or less, the lysine release rate is 12%, the free amino acid content is 10%, the ammonia content is 0.09%,
The transmittance of the 10% solution was stable at 100%, the pH of the 5% solution was not adjusted, and heating at 120 ° C. for 10 minutes at pH 4.

【0081】[0081]

【発明の効果】以上詳述したように本発明は、風味良好
な乳清蛋白加水分解物及びその製造法であり、本発明に
よって奏せられる効果は、次のとおりである。 1)本発明の乳清蛋白質加水分解物は、腸管吸収性にお
いて優れ、アミノ酸バランスが良好なので、消化吸収能
の未熟な乳幼児又は消化吸収能が低下している高齢者、
病人への蛋白質供給源用素材として使用できる。 2)本発明の乳清蛋白質加水分解物は、抗原残存活性が
ないので、アレルギー患者、アレルギー予防を目的とし
て乳幼児、妊産婦、免疫機能の低下した病人への蛋白質
供給源用素材として使用できる。 3)本発明の乳清蛋白質加水分解物は、抗酸化作用を有
し、熱安定性、透明性も高く、風味良好なので母乳強化
組成物や経口経腸栄養剤の蛋白質供給源用素材として使
用できる。 4)本発明の方法により、広範な用途を有する乳清蛋白
質加水分解物を製造することができる。
As described in detail above, the present invention is a whey protein hydrolyzate having a good taste and a method for producing the same, and the effects of the present invention are as follows. 1) The whey protein hydrolyzate of the present invention is excellent in intestinal absorptivity and has a good amino acid balance.
It can be used as a material for protein supply to sick people. 2) Since the whey protein hydrolyzate of the present invention has no antigen residual activity, it can be used as a protein supply source material for infants, pregnant women, and sick people with reduced immune function for the purpose of preventing allergies and allergies. 3) The whey protein hydrolyzate of the present invention has antioxidant activity, high heat stability, high transparency, and good taste, so that it can be used as a protein source material for breast milk fortifying compositions and oral enteral nutrition. it can. 4) By the method of the present invention, a whey protein hydrolyzate having a wide range of uses can be produced.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の乳清蛋白加水分解物の分子量分布を示
す。
FIG. 1 shows the molecular weight distribution of the whey protein hydrolyzate of the present invention.

【図2】本発明の乳清蛋白加水分解物の抗原残存活性を
示す。
FIG. 2 shows the residual antigen activity of the whey protein hydrolyzate of the present invention.

【図3】本発明の乳清蛋白加水分解物の抗酸化活性を示
す。
FIG. 3 shows the antioxidant activity of the whey protein hydrolyzate of the present invention.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 磯村 奈生子 神奈川県座間市東原5−1−83 森永乳 業株式会社栄養科学研究所内 (72)発明者 赤染 陽子 神奈川県座間市東原5−1−83 森永乳 業株式会社栄養科学研究所内 (72)発明者 越智 浩 神奈川県座間市東原5−1−83 森永乳 業株式会社栄養科学研究所内 (72)発明者 河本 美穂子 神奈川県座間市東原5−1−83 森永乳 業株式会社栄養科学研究所内 (58)調査した分野(Int.Cl.6,DB名) A23J 3/34 A23J 3/08 A23L 1/305 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Naoko Isomura 5-1-83 Higashihara, Zama City, Kanagawa Prefecture Morinaga Milk Industry Co., Ltd. (72) Inventor Yoko Akasemi 5-1-83 Higashihara, Zama City, Kanagawa Prefecture Inside the Nutrition Science Laboratory, Morinaga Milk Industry Co., Ltd. (72) Inventor Hiroshi Ochi 5-1-83, Higashihara, Zama City, Kanagawa Prefecture Inside the Nutrition Science Laboratory, Morinaga Milk Industry Co., Ltd. (72) Miho Kawamoto, 5-1 Higashihara, Zama City, Kanagawa Prefecture −83 Morinaga Milk Industry Co., Ltd. Nutrition Science Research Institute (58) Field surveyed (Int. Cl. 6 , DB name) A23J 3/34 A23J 3/08 A23L 1/305

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 純度が少なくとも70%(重量)の乳清
蛋白質の加水分解物であって、次のa)〜h)の理化学
的性質; a)分子量5,000〜10,000ダルトンの画分
が、全加水分解物の1%(重量)未満であること、 b)抗乳清蛋白質血清を用いたエライザ抑制試験法によ
り測定した抗原残存活性が10-5以下であること、 c)加水分解物の全アミノ酸の量に対する遊離アミノ酸
の量の割合が10〜15%(重量)であること、 d)乳清蛋白質に含まれる全リジンの量に対する遊離リ
ジンの量の割合が12〜20%(重量)であること、 e)アンモニア含量が0.2%(重量)以下であるこ
と、 f)10%(重量)溶液を1cmのセル、540nmで
測定した透過率が98%以上であること、 g)pH4〜7の5%(重量)溶液を120℃で10分
間加熱して沈殿を生じないこと、及び h)抗酸化活性を有すること、を有することを特徴とす
る風味良好な乳清蛋白加水分解物。
1. A whey protein hydrolyzate having a purity of at least 70% (by weight), comprising the following physicochemical properties of a) to h): a) a fraction having a molecular weight of 5,000 to 10,000 daltons B) less than 10 -5 of the residual antigen activity as determined by ELISA test using anti-whey protein serum, The ratio of the amount of free amino acids to the total amount of amino acids in the hydrolyzate is 10 to 15% (by weight). D) The ratio of the amount of free lysine to the total amount of lysine contained in whey protein is 12 to 20%. (Weight) e) Ammonia content is less than 0.2% (weight) f) 10% (weight) solution is 1 cm cell and transmittance measured at 540 nm is 98% or more G) 5% (weight) solution of pH 4-7 It does not cause heat to precipitate at 120 ° C. 10 minutes, and h) to have antioxidant activity, characterized by having a good flavor whey protein hydrolyzate.
【請求項2】 純度が少なくとも70%(重量)の乳清
蛋白質を15%(重量)以下の濃度で水に溶解し、該水
溶液のpHを7.5〜10に調整し、該水溶液にバシラ
ス・サチリス(Bacillus subtilis) 由来のエンドペプチ
ダーゼ及び乳酸菌由来のエキソペプチダーゼの2種類の
蛋白分解酵素を添加して加水分解を開始し、分解液中の
遊離リジン量を経時的に測定し、出発原料である乳清蛋
白質に含まれる全リジンの量に対する遊離リジンの量の
割合が12〜20%(重量)の範囲で加水分解を停止
し、限外濾過して分子量10,000ダルトン以上の画
分を完全に除去することを特徴とする風味良好な乳清蛋
白加水分解物の製造法。
2. A whey protein having a purity of at least 70% (by weight) is dissolved in water at a concentration of 15% (by weight) or less, the pH of the aqueous solution is adjusted to 7.5 to 10, and Bacillus is added to the aqueous solution. Addition of two types of proteolytic enzymes, endopeptidase derived from subtilis (Bacillus subtilis) and exopeptidase derived from lactic acid bacteria, to start hydrolysis, and measure the amount of free lysine in the decomposition solution with time, The hydrolysis is stopped when the ratio of the amount of free lysine to the total amount of lysine contained in a certain whey protein is in the range of 12 to 20% (by weight), and ultrafiltration is performed to obtain a fraction having a molecular weight of 10,000 daltons or more. A method for producing a flavorful whey protein hydrolyzate, which comprises completely removing the hydrolyzate.
JP6274303A 1994-10-14 1994-10-14 Savory whey protein hydrolyzate and method for producing the same Expired - Fee Related JP2959747B2 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
JP6274303A JP2959747B2 (en) 1994-10-14 1994-10-14 Savory whey protein hydrolyzate and method for producing the same
CA002202633A CA2202633C (en) 1994-10-14 1995-10-13 Peptide mixture and products thereof
PCT/JP1995/002109 WO1996011584A1 (en) 1994-10-14 1995-10-13 Peptide mixture and products thereof
EP95934302A EP0799577B1 (en) 1994-10-14 1995-10-13 Peptide mixture and products thereof
DE69523791T DE69523791T2 (en) 1994-10-14 1995-10-13 PEPTIDE MIXTURE AND PRODUCTS THEREOF
AU36738/95A AU692612B2 (en) 1994-10-14 1995-10-13 Peptide mixture and products thereof
US08/817,095 US5952193A (en) 1994-10-14 1995-10-13 Peptide mixture and products thereof
DK95934302T DK0799577T3 (en) 1994-10-14 1995-10-13 Peptide Mixture and Products thereof
NZ294046A NZ294046A (en) 1994-10-14 1995-10-13 A palatable whey protein hydrolysate having antioxidant activity
AU63603/98A AU701507B2 (en) 1994-10-14 1998-04-24 Peptide mixture and products thereof
US09/316,957 US6395508B1 (en) 1994-10-14 1999-05-24 Peptide mixture and products thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6274303A JP2959747B2 (en) 1994-10-14 1994-10-14 Savory whey protein hydrolyzate and method for producing the same

Publications (2)

Publication Number Publication Date
JPH08112063A JPH08112063A (en) 1996-05-07
JP2959747B2 true JP2959747B2 (en) 1999-10-06

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JP4619730B2 (en) * 2004-09-07 2011-01-26 イーエヌ大塚製薬株式会社 Amino acid / peptide mixture with excellent flavor and method for producing the same
AR058918A1 (en) * 2006-01-04 2008-03-05 Leprino Foods Co HYDROLYZED PROTEINS AND METHODS TO PREPARE THEM
JP5380649B2 (en) * 2007-03-16 2014-01-08 株式会社アップウェル Milk component hydrolyzate
RU2475031C2 (en) * 2007-05-18 2013-02-20 Мид Джонсон Нутришен Компани Acidified liquid additive to human milk
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