EP1295112A1 - Positive identification of samples analysed by electrophoresis on a porous support - Google Patents
Positive identification of samples analysed by electrophoresis on a porous supportInfo
- Publication number
- EP1295112A1 EP1295112A1 EP01928030A EP01928030A EP1295112A1 EP 1295112 A1 EP1295112 A1 EP 1295112A1 EP 01928030 A EP01928030 A EP 01928030A EP 01928030 A EP01928030 A EP 01928030A EP 1295112 A1 EP1295112 A1 EP 1295112A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrophoresis
- applicator
- sample
- samples
- marker
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/447—Systems using electrophoresis
- G01N27/44704—Details; Accessories
- G01N27/44743—Introducing samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/447—Systems using electrophoresis
- G01N27/44704—Details; Accessories
- G01N27/44717—Arrangements for investigating the separated zones, e.g. localising zones
- G01N27/44721—Arrangements for investigating the separated zones, e.g. localising zones by optical means
- G01N27/44726—Arrangements for investigating the separated zones, e.g. localising zones by optical means using specific dyes, markers or binding molecules
Definitions
- the subject of the invention is the definition and implementation of means for positive identification of samples analyzed by electrophoresis. More specifically, the invention relates to means for identifying sample applicators on an electrophoresis support, which make it possible to associate with the electrophoretic profile of one or more series of analyzed samples, the applicator or samples used and therefore, reliably identify the result of the analysis compared to the primary samples.
- Uncertainty as to the attribution of a result to the good primary sample can result for example from operations executed manually and whose good execution depends on this fact essentially from the attention of the operator. In the current practice of this type of analysis, an error may not be detected.
- the invention thus proposes identification means which make it possible to locate a sample or a series of samples and to identify it on the electrophoresis support, at the end of the electrophoretic separation.
- These means can be implemented in the context of any electrophoretic separation, using any suitable technique for performing zone electrophoresis on a support.
- the invention also relates to sample applicators, usable for depositing the samples to be analyzed on the electrophoresis support, and provided with identification means (called "identification markers") according to the invention.
- the invention also provides kits comprising said identification means.
- the means defined in the context of the invention can be integrated into a global tracking system for the samples analyzed at all stages of the analysis, from the taking of the sample, to the transmission of the result.
- the zone electrophoresis techniques carried out in particular in agarose gel allow the separation of the protein constituents contained in biological samples such as serum, blood, urine, cerebrospinal fluid, tears, etc.
- biological samples such as serum, blood, urine, cerebrospinal fluid, tears, etc.
- the samples containing the proteins are deposited by means of a sample applicator on the surface of the gel, where they ionize and, under the effect of an electric field, migrate at different speeds depending on their respective charge. After the migration step which allows the separation of the protein constituents of the samples, these proteins are revealed, for example by coloring using a specific dye and quantified for example by a densitometric reading.
- electrophoresis has been brought to a significant degree of automation in order, on the one hand, to facilitate its implementation and, on the other hand, to make it more reliable.
- steps of loading the samples on the applicators, depositing the applicators on the gel, migration and drying of the gel, coloring and discoloration of the gel, reading of the gel can now be carried out automatically.
- the step of transferring the sample applicator (s) from the loading samples to the electrophoresis instrument is still a manual step and therefore subject to handling errors.
- the applicator intended for the first can be loaded onto the second and vice versa.
- the invention provides means for assigning a series of samples deposited on the electrophoresis support in the form of a row of samples, to a given sample applicator, by simply examining the electrophoretic image of this row.
- the invention makes it possible to identify an applicator without error and consequently a series of samples to be analyzed associated with this applicator, by examining the electrophoretic image of the applicator obtained, after the deposition, migration and staining operations. and drying, means for identifying the applicator and simultaneously, the samples analyzed.
- the use of the present invention in combination with conventional methods of identification (for example bar codes or two-dimensional codes such as matrix codes) of the various components of the analysis system, in particular the sample tubes, the applicator and gel, allows identification and traceability of samples from the primary tube containing the sample, to the final result.
- conventional methods of identification for example bar codes or two-dimensional codes such as matrix codes
- a sample applicator usable in the context of the present invention can be constituted by any type of device making it possible to load samples to be analyzed, in particular by taking these samples from the tubes in which they are contained and also making it possible to load, in a determined area, an identification marker of the applicator according to the invention.
- a sample applicator can be loaded manually or preferably automatically, with the samples.
- Applicators that can be used have been described in the prior art and are, for example, the "membrane” (or toothed) combs described, for example, in patent applications and patents EP 0 493 996, US 5,464,515, US 5.405.516, the "throat” combs the “lamella” combs, or in general, any device which can be used to load and then deposit on an electrophoresis support samples to be analyzed.
- the identification markers of the applicator which are the subject of the invention, can consist of any chemical species capable of being revealed on the electrophoresis support, the outcome of the steps of depositing, migrating, coloring and drying the electrophoresis support.
- the markers of the invention must be able to be detected directly by examination of the electrophoresis support after electrophoresis or by means of the techniques for detecting the constituents of the samples separated by electrophoresis.
- chemical species applies within the framework of the invention, to any entity, chemical or biological, capable of being detected, directly or indirectly, including compounds, molecules, complexes, ions, associations (by example of Antibody-Antigens type) chemically or biologically functional, or non-functional.
- chemical species are the chemical species colored or capable of being colored, in particular proteins, or functional species such as antibodies.
- the chemical species used are capable of migrating in an electric field.
- the marker can consist of mixtures of the above species whether or not these species belong to the same chemical or biological group, and whether or not have functional properties of the same nature.
- the marker can be composed of a mixture of chemical species capable of migrating in an electric field and of species which do not migrate but precipitate at their deposition zone.
- compositions must not be able to be confused, by the electrophoretic image to which they give rise, with the samples analyzed, separated by electrophoresis.
- it is proposed to use as means of identification of each sample applicator, colored chemical species or mixtures of these species, mixtures in which several chemical species are present and each or certain d 'between them having a different electrophoretic mobility compared to that of other species, or some of the others.
- each of the applicators used carrying different series of distinct samples, must be associated with a determined marker which is specific to it insofar as it distinguishes it from other applicators or, in a variant, must be associated with a marker common to different applicators but nevertheless located differently at the level of the applicator and consequently, at the level of the electrophoresis support after reaction, by the location of the marked electrophoresis support tracks.
- a common marker can be constituted by any of the chemical species defined above, by a mixture of these species, including by physiological water.
- the marking of a series of samples results from the absence of loading of an area (well) of the sample applicators, this area normally intended for loading the samples, being localized differently for each applicator, so as to give a different electrophoretic image (by the absence of separate and revealed bands) on the electrophoresis support.
- the specificity of the marker is due either to the nature and / or to the concentration of the chemical species which constitutes it, or to the localization in a specific zone of the applicator, of this composition, or even to a combination previous parameters, the specificity of the marker having to translate into a different electrophoretic image for each applicator linked for example to the color, the positioning, the number or the intensity of the bands obtained for each marker on its electrophoresis track, after the electrophoretic analysis.
- a marker can also be identified by the track it occupies on the electrophoresis support, compared to the tracks occupied by the other markers on the same or on another support.
- identification markers can be used:
- a dye or a mixture of dyes, or any other colored species for example a covalently colored protein, migrating or not, each applicator being identified by a particular color, or a mixture of colored bands,
- a protein or any other chemical species liable to migrate and become colored, for example when coloring the gel with conventional protein dyes: amidoswchwarz, acid violet, etc. or a mixture of proteins or chemical species ) present at varying concentrations in each of the markers.
- Each applicator will be identified by the intensity of the fraction (s) corresponding to the concentration of the protein (s) (or chemical species),
- the same identification marker chosen from the previous ones can be used for all of the sample applicators used, as soon as this marker is placed on each applicator, in a predetermined well, distinct for each applicator , which allows after the separation of the samples by electrophoresis, to locate the image of the same marker in a different zone for each applicator. Marking may alternatively result in this case from the absence of an electrophoretic profile for a specific track for each row of samples, corresponding to the wells of the applicator left free.
- the subject of the invention is also a method of analysis by electrophoresis, in which several applicators are used to deposit series of samples on one or more electrophoresis supports, these applicators having first been loaded with the samples to be analyzed, on the other hand with a specific marker for each of the applicators or a common marker loaded in a different specific area for each applicator.
- a method of electrophoresis analysis of components of samples, in particular biological samples taken from patients comprises the following steps:
- each applicator comprising means for identifying it (identification marker), identifiable by examining the support for electrophoresis after electrophoresis;
- the process thus defined for the analysis by electrophoresis of the constituents of samples to be analyzed can be integrated into a system in which the identification means of the applicator are associated with a complete tracking system of all the components of the analysis system in the process of identifying the samples to be analyzed in relation to the result obtained at the end of the electrophoresis.
- Each identification marker deposited on the electrophoresis support, at the same time as the samples, and subjected to electrophoresis, gives a particular electrophoretic image which must be identifiable, in particular visible, on the electrophoresis support, after the different stages of the analysis: migration, coloring and drying.
- This identification can be done manually by an operator or automatically, for example during the analysis of the electrophoresis support by a densitometer.
- the marking of the marker can be part of an identification system of the different components of the analysis system such as the bar code, two-dimensional code (or any other identification system).
- the various components of the system including the sample tubes, the tubes of markers for applicator, the applicators, the analysis support are then identified by a code.
- the code of the different primary tubes of the samples, of the marker tube or tubes and of the applicator (s) is read.
- the marker and the samples are then loaded, preferably by means of an automatic machine, at positions marked with the corresponding applicator (s).
- each applicator and the corresponding samples it carries are therefore fully identified.
- the applicator or applicators thus loaded and the electrophoresis support are introduced into the electrophoresis instrument after reading their respective code.
- each electrophoresis support is associated with one or more applicators.
- the support is introduced into the densitometer after reading its code.
- the densitometer, or operator locates the marker on each row, which allows the system to identify the samples in that row without error and therefore assign a result to them. This system therefore ensures total traceability of the samples from the primary tube to the final result.
- the electrophoresis analysis method comprises, for the detection of the separate constituents and / or of applicator identification markers, a step of revealing the separated constituents at the end electrophoresis.
- different sample applicators are used to deposit several rows of different samples on the same electrophoresis support.
- different sample applicators are used to deposit several rows of different samples on different electrophoresis supports.
- several electrophoreses can be performed in parallel on different instruments, in parallel.
- the identification marker of each applicator is constituted by a specific composition for each applicator, deposited on a track determined on the electrophoresis support, simultaneously with samples.
- the identification marker for each applicator is constituted by a composition common to all the applicators, said composition being deposited on the electrophoresis support at a different track for each applicator and therefore for the electrophoresis support, simultaneously with the samples.
- the identification marker for sample applicators consists of any composition as defined above.
- each applicator comprising means for identifying it (identification marker), identifiable by examining the support for electrophoresis after electrophoresis;
- the identification marker can be identified before the step of coloring the electrophoresis support, or if it is not a colored marker, by coloring during the step of detection of the constituents of the samples which includes the coloring of the electrophoresis support.
- the colored chemical species are antibodies, preferably monoclonal so as to obtain a distinct band, and in the hypothesis of the use of a mixture of monoclonal antibodies, each antibody has a mobility such that it leads to the production of a band distinct from those obtained with the other antibodies in the mixture.
- These antibodies can be detected by any method known per se, applicable within the framework of an analysis comprising an electrophoretic separation.
- the electrophoretic separation is carried out on any type of electrophoresis support and in particular on supports such as gels, in particular agarose gels, polyacrylamide gels, or on cellulose acetate membranes.
- supports such as gels, in particular agarose gels, polyacrylamide gels, or on cellulose acetate membranes.
- any porous support will be used allowing the diffusion of the samples and their migration in the support to allow the separation of the constituents contained in these samples.
- the method is an immunofixation method in which the constituents separated from the samples are revealed in any way known per se, by means of antibodies, said method incorporating, in the step of deposit of the samples to be analyzed, deposit of an identification marker for the sample applicator.
- the invention also relates to a method for positive identification of samples, to enable the electrophoretic image of a analyzed sample, to a sample taken, comprising a step of marking the sample applicator by means of an identification marker, identifiable by its electrophoretic image and the use of the sample applicator thus marked for the deposit of the samples to be analyzed on an electrophoresis support.
- kit for carrying out the analysis of the constituents of samples by electrophoresis, comprising:
- An electrophoresis support comprising a porous material suitable for receiving the samples to be analyzed and the identification marker of the sample applicator and allowing their electrophoretic migration
- compositions made up of chemical species usable during an electrophoretic analysis for the identification of sample applicator (s), this (these) composition (s) being identifiable by its (their) electrophoretic image.
- sample applicator marker used in this kit meets the definitions given above, taken individually or in combination.
- kit can include any reagent usually used for electrophoresis analyzes, in particular all or part of the following reagents:
- Figures 1 to 7 Profiles of electrophoretic analysis of several series of samples, associated with different markers of sample applicators as described in examples 1 to 7.
- the markers consist of the following solutions:
- 10 ⁇ l of each marker are deposited in the well of the first tooth of 2 deposition applicators of the type described in patents EP 0493 996, US 5,464,515, US 5,405,516. In the other wells, 10 ⁇ l of each serum to be analyzed is deposited. These applicators are then applied for 30 seconds, at a defined distance from each other, to the surface of a gel allowing the analysis of serum proteins. The separation of the samples is obtained by electrophoresis for approximately 6 minutes and at a power of 20 W, on an instrument making it possible to regulate the temperature to 20 ° C.
- depot n ° 1 red strip, marker n ° 1
- Example 2 The markers consist of the following solutions:
- - marker No. 3 bovine albumin 2.5 mg / ml in physiological water. 10 ⁇ l of each marker are deposited in the well of the first tooth of 3 deposition applicators of the type described in patents EP 0 493 996, US 5,464,515, US 5,405,516. In the other wells, 10 ⁇ l of each serum to be analyzed is deposited. These applicators are then applied for 30 seconds, at a defined distance from each other, to the surface of a gel allowing the analysis of serum proteins. The separation of the samples is obtained by electrophoresis for approximately 6 minutes and at a power of 20 W, on an instrument making it possible to regulate the temperature to 20 ° C.
- the markers are differentiated by the different position of their respective bands.
- the markers consist of the following solutions:
- - marker No. 3 hemoglobin 2 mg / ml, ovalbumin 10 mg / ml and bovine albumin 2.5 mg / ml in physiological water.
- 10 ⁇ l of each marker are deposited in the well of the first tooth of 3 deposition applicators of the type described in patents EP 0 493 996, US 5,464,515, US 5,405,516. In the other wells, 10 ⁇ l of each serum to be analyzed is deposited. These applicators are then applied for 30 seconds, at a defined distance from each other, to the surface of a gel allowing the analysis of serum proteins.
- the separation of the samples is obtained by electrophoresis for approximately 6 minutes and at a power of 20 W, on an instrument making it possible to regulate the temperature to 20 ° C.
- the gel After migration, the gel is dried and then stained with amidoschwarz. After coloring, the gel is discolored and dried again.
- the corresponding marker is recognized on the first line of each row:
- the markers are differentiated in this case by the number of bands present.
- the markers consist of the following solutions:
- - marker No. 3 anti apo B monoclonal antibodies clone 1, clone 2 and clone 3 at 3 mg / ml each in physiological water.
- 10 ⁇ l of each marker are deposited in the then of the first tooth of 3 deposition applicators of the type described in patents EP 0 493 996, US 5,464,515, US 5,405,516. In the other wells, 10 ⁇ l of each is deposited serum to be analyzed. These applicators are then applied for 30 seconds, at a defined distance, to the surface of a gel 'allowing the analysis of serum proteins. The separation of the samples is obtained by electrophoresis for approximately 6 minutes and at a power of 20 W, on an instrument making it possible to regulate the temperature to 20 ° C. After migration, the gel is dried and then stained with amidoschwarz. After coloring, the gel is discolored and dried again. In Figure 4, we recognize on the first line of each row, the corresponding marker:
- the markers are differentiated in this case by the number of bands present.
- the markers consist of the following solutions:
- - marker No. 3 bovine albumin 80 mg / ml in physiological water. 10 ⁇ l of each marker are deposited in the well of the first tooth of 3 deposition applicators of the type described in patents EP 0 493 996, US 5,464,515, US 5,405,516. In the other wells, 10 ⁇ l of each serum to be analyzed is deposited. These applicators are then applied for 30 seconds, at a defined distance from each other, to the surface of a gel allowing the analysis of serum proteins. Separation of the samples is obtained by electrophoresis for 6 minutes and at a power of 20 W, an instrument for regulating the temperature at 20 ° C. After migration, the gel is dried and then stained with amidoschwarz. After coloring, the gel is discolored and dried again. In FIG. 5, the corresponding marker is recognized on the first line of each row:
- the markers are differentiated in this case by the intensity of the corresponding band.
- the identification is carried out as follows:
- the marker is a 2.5 mg / ml solution in physiological water, of partially polymerized bovine gamma globulin (with glutaraldehyde), the identification is carried out as follows:
- the samples to be analyzed are diluted to a third for the IgA, IgM, IgK, Ig ⁇ lanes, and to the sixth for the IgG lane, and 10 ⁇ l of each dilution are deposited in the corresponding wells. These applicators are then applied for 1 minute, at a defined distance from each other, to the surface of a gel allowing immunofixation to be carried out.
- the separation of the samples is obtained by electrophoresis for approximately 8 minutes and at a power of 20 W, on an instrument making it possible to regulate the temperature to 20 ° C.
- the typing of the paraproteins was carried out by incubating each migration track with a specific antiserum (anti IgG, anti IgA, anti IgM, anti IgK, anti Ig ⁇ ) and the track corresponding to the electrophoretic profile with a protein fixing solution. .
- the marker track is not subject to any special treatment. Excess reagents were removed, the gel was dried and stained with acid purple. Each comb is identified by the position of the colored band corresponding to the marker:
- central depot presence of a colored band
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0007045 | 2000-05-31 | ||
FR0007045A FR2809818B1 (en) | 2000-05-31 | 2000-05-31 | POSITIVE IDENTIFICATION OF SAMPLES ANALYZED BY ELECTROPHORESIS ON POROUS SUPPORT |
PCT/FR2001/001233 WO2001092866A1 (en) | 2000-05-31 | 2001-04-20 | Positive identification of samples analysed by electrophoresis on a porous support |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1295112A1 true EP1295112A1 (en) | 2003-03-26 |
Family
ID=8850875
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01928030A Withdrawn EP1295112A1 (en) | 2000-05-31 | 2001-04-20 | Positive identification of samples analysed by electrophoresis on a porous support |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP1295112A1 (en) |
JP (1) | JP2003535333A (en) |
CN (1) | CN1386195A (en) |
AR (1) | AR027727A1 (en) |
AU (1) | AU5490001A (en) |
BR (1) | BR0106675A (en) |
CA (1) | CA2382000A1 (en) |
FR (1) | FR2809818B1 (en) |
TW (1) | TW518415B (en) |
WO (1) | WO2001092866A1 (en) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4507233A (en) * | 1981-04-22 | 1985-03-26 | Oriental Yeast Co., Ltd. | Colored molecular weight marker |
US5275710A (en) * | 1990-05-14 | 1994-01-04 | Labintelligence, Inc. | Gel electrophoresis system including optical stage, sample applicator and sample retriever |
FR2671290B1 (en) * | 1991-01-04 | 1993-04-16 | Sebia Sa | DEVICE FOR APPLYING BIOLOGICAL SAMPLES TO AN ELECTROPHORESIS PLATE. |
FR2684998B1 (en) * | 1991-12-11 | 1994-10-28 | Sebia Sa | METHOD FOR SEPARATING LP (A) BY ELECTROPHORESIS, GELS FOR IMPLEMENTING THIS METHOD, AND APPLICATION TO THE IN VITRO DETERMINATION OF THE ATHEROGENIC RISK LINKED TO THE PRESENCE OF LP (A). |
FR2715229B1 (en) * | 1994-01-14 | 1996-05-10 | Sebia Sa | Device for immunofixation on a single (plated) support, of different samples. |
WO1997042496A1 (en) * | 1996-05-06 | 1997-11-13 | Helena Laboratories Corporation | A system for the application of samples on a substrate__________ |
FR2760844B1 (en) * | 1997-03-17 | 1999-05-21 | Genethon Ii | DEVICE AND METHOD FOR AUTOMATIC ANALYSIS OF SAMPLES ON GELS |
US6110683A (en) * | 1999-01-08 | 2000-08-29 | Commonwealth Biotechnologies, Inc. | Automated DNA Sequencer loading dye which contains a lane tracking aid |
US6168701B1 (en) * | 1999-04-30 | 2001-01-02 | The Perkins-Elmer Corporation | Methods and compositions for improving the loading of analytical instruments |
-
2000
- 2000-05-31 FR FR0007045A patent/FR2809818B1/en not_active Expired - Fee Related
-
2001
- 2001-03-07 TW TW90105223A patent/TW518415B/en not_active IP Right Cessation
- 2001-03-27 AR ARP010101446A patent/AR027727A1/en unknown
- 2001-04-20 AU AU54900/01A patent/AU5490001A/en not_active Abandoned
- 2001-04-20 CN CN 01802249 patent/CN1386195A/en active Pending
- 2001-04-20 EP EP01928030A patent/EP1295112A1/en not_active Withdrawn
- 2001-04-20 BR BR0106675-7A patent/BR0106675A/en not_active Application Discontinuation
- 2001-04-20 WO PCT/FR2001/001233 patent/WO2001092866A1/en not_active Application Discontinuation
- 2001-04-20 JP JP2002501023A patent/JP2003535333A/en active Pending
- 2001-04-20 CA CA002382000A patent/CA2382000A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO0192866A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2809818A1 (en) | 2001-12-07 |
WO2001092866A1 (en) | 2001-12-06 |
FR2809818B1 (en) | 2003-10-24 |
CA2382000A1 (en) | 2001-12-06 |
JP2003535333A (en) | 2003-11-25 |
TW518415B (en) | 2003-01-21 |
CN1386195A (en) | 2002-12-18 |
AU5490001A (en) | 2001-12-11 |
AR027727A1 (en) | 2003-04-09 |
BR0106675A (en) | 2002-07-23 |
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