WO2000018893A1 - Procede de preparation d'un melange d'enzymes de branchement de l'amidon extraites d'algues - Google Patents
Procede de preparation d'un melange d'enzymes de branchement de l'amidon extraites d'algues Download PDFInfo
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- WO2000018893A1 WO2000018893A1 PCT/FR1999/002261 FR9902261W WO0018893A1 WO 2000018893 A1 WO2000018893 A1 WO 2000018893A1 FR 9902261 W FR9902261 W FR 9902261W WO 0018893 A1 WO0018893 A1 WO 0018893A1
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- starch
- algae
- enzymes
- mixture
- branching enzymes
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/10—Transferases (2.)
- C12N9/1048—Glycosyltransferases (2.4)
- C12N9/1051—Hexosyltransferases (2.4.1)
- C12N9/107—1,4-Alpha-glucan branching enzyme (2.4.1.18)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/18—Preparation of compounds containing saccharide radicals produced by the action of a glycosyl transferase, e.g. alpha-, beta- or gamma-cyclodextrins
Definitions
- the present invention relates to a process for the preparation of a mixture of starch branching enzymes extracted from unicellular algae.
- the present invention also relates to a process for modifying starch and its derivatives using said mixture, as well as the starch and modified starch derivatives thus obtained.
- starch means natural or hybrid starch derived from potato, from potato with a high amyiopectin content.
- starch derivatives is understood in particular to mean all of the modified starches resulting from the enzymatic, chemical and / or physical modification, in one or more stages, of this starch.
- the starch derivatives may in particular be starches modified by at least one of the known techniques of etherification, esterification, crosslinking, oxidation, alkaline treatment, acid and / or enzymatic hydrolysis.
- the present invention also relates to an enzyme composition containing starch branching enzymes extracted from unicellular algae, significantly depleted in enzymes with amylase activity and debranching starch.
- branching enzymes also called branching enzymes
- branching enzymes are found in plants where they help build up the starch reserve polymer. These enzymes are more particularly involved in the synthesis of the branched fraction of starch, 1 amyiopectin, and in the synthesis of a few branching points of the linear fraction of starch, 1 amylose.
- starch branching enzymes catalyze the hydrolysis of the glucosidic bonds -1,4 and their transformation into glucosidic bonds ⁇ -1,6. These enzymes are therefore transfer enzymes, namely 1,4- -D- glucan: 1, 4- ⁇ -D-glucan 6- -D- (1, 4- -D-glucano) - transferases.
- Starch branching enzymes are very diverse. They are usually classified into two classes: starch branching enzymes of type I and those of type II. Type I branching enzymes branch linear structures such as amylose at a higher rate than amyiopectin and preferentially transfer long glucosidic chains (Degree of polymerization or average DP of these chains (between 10 and 30).
- type II branching enzymes branch linear structures such as amylose, at a slower rate than amyiopectin and preferentially transfer shorter glucosidic chains.
- microbial world all living microorganisms such as in particular bacteria, yeasts, molds and unicellular algae.
- the branching enzymes which can be isolated from bacteria or yeasts and which are capable of modifying starch and its derivatives are the branching enzymes which participate in the synthesis of another reserve polymer, glycogen. These glycogen branching enzymes belong to the same group as the starch branching enzymes, even if their specificity of action is different, especially in terms of the length of glucosidic chains transferred (average D.P. from 3 to 5).
- US Pat. No. 4,454,161 describes, for example, a glycogen branching enzyme isolated from Bacill us megateri um, used to improve the quality of starch from different foods, preventing the tendency to downgrade structures prepared from starch and increasing their indigestibility and therefore their properties of dietary fiber.
- Patent EP 418,945 also claims, for the same application as that mentioned above, the use of a thermostable glycogen branching enzyme isolated from Bacill us stearothermophil us.
- this type of enzyme is far from equaling the specificity and the diversity of actions of starch branching vegetable enzymes. These enzymes therefore do not meet the ever-increasing demand for a greater variety of branched compounds which are new in their structures and in their properties.
- an advantageous source of branching enzymes is the unicellular algae, which accumulates starch and therefore, like higher plants, has starch branching enzymes .
- the branching enzymes that can be isolated from unicellular algae have been described by FREDERICK (1973, Ann. NY Acad. Sci., 210, 254-264), who was one of the first to report the existence of an enzyme Q in the alga Chl orella pyrenoidosa, enzyme capable of transferring on amyloidosis a length distribution of glucosidic chains characteristic of amyiopectin.
- This enzyme was purified from polyacrylamide gels in which all the enzymes extracted from this alga were migrated by electrophoresis.
- electrophoretic process pertaining to analytical techniques, cannot in any way lead to the obtaining of a sufficient quantity of enzymes which can make it possible to envisage an industrial application aiming at transforming them, by plugging them in. starch or its derivatives.
- contaminating enzymes Two categories of contaminating enzymes are generally described during the purification processes of starch branching enzymes which are extracted from higher plants, contaminating enzymes also present in unicellular algae.
- enzymes with amylase activity and enzymes with starch-disconnecting activity (mainly with isoamylase-type activity which specifically hydrolyze -1,6 bonds).
- Elimination of enzymes with amylase activity is therefore usually considered as the first operation to be carried out before any purification process proper.
- the enzymes with debranching activity constitute however the major problem encountered for the isolation of starch branching enzymes.
- these debranching enzymes are co-purified with the starch branching enzymes, because they have similar physico-chemical properties.
- starch branching enzymes in order to obtain original starch and starch derivatives both in their structures and in their properties, this in order to find new applications for starch and its derivatives, especially in the food industry, and to prepare these starch branching enzymes in a simple, efficient and industrializable manner.
- the present invention relates to a process for the preparation of a mixture of starch branching enzymes extracted from unicellular algae, characterized in that: a. modifies a unicellular algae so that it no longer expresses starch disconnecting activity, b. processes this modified unicellular algae so as to obtain a concentrated ⁇ -cellular extract, c. performs a molecular sieving of this concentrated ⁇ -cellular extract so as to obtain said mixture of starch branching enzymes extracted from algae.
- the mixture of starch branching enzymes according to the invention consists of all the starch branching enzymes of type I and type II of the unicellular alga.
- the first step of the process according to the invention consists in modifying a unicellular algae so that it no longer expresses the starch disconnecting activity.
- the Applicant company has overcome a particularly strong technical prejudice, since it has always been recommended to eliminate contaminating amylase activities in the first place. Indeed, these enzymatic activities interfere with the measurements of the starch branching activities carried out in the different fractions sampled during the purification steps.
- the Applicant company has however found that the use of single-cell algae is suitable advantageously at a preliminary stage of elimination of the debranching activity of the starch, which then makes it possible to efficiently separate the branching enzymes from the starch disconnecting enzymes.
- the Applicant Company therefore imagined modifying the unicellular algae to eliminate the enzymatic activity of disconnection of the starch rather than using, as usual, a chromatographic separation step.
- the unicellular alga is modified by mutation, and more particularly still by mutation by insertion at the locus of the gene coding for the starch-unplugging enzyme.
- locus is intended to mean the position on the chromosome where the gene coding for the enzyme of interest is located, in this case here the starch-disconnecting enzyme.
- the insertion mutation known to those skilled in the art, consists in promoting the punctual integration of DNA fragments into the genome of the unicellular alga.
- the selection of mutants which no longer produce starch but accumulate phytoglycogen makes it possible to isolate the insertion mutants at the locus coding for the starch-unplugging enzyme.
- the second step of the process according to the invention consists in treating this modified unicellular alga so as to obtain a concentrated ⁇ -cellular extract.
- the ⁇ -cellular extract is defined as the set of proteins with or without enzymatic activities, which will be extracted from the unicellular algae concentrate. This ⁇ -cellular extract is obtained by first carrying out a culture of this unicellular alga modified on a large scale, so as to obtain a culture of optimal cell density.
- This culture is to be adapted to the physiology of the unicellular alga considered, in terms of directly assimilable carbon and nitrogen sources, duration and fermentation process.
- the culture is preferably carried out until the end of the exponential growth phase.
- the cell suspension obtained at the end of the preceding culture is then concentrated by means of a cell separator, for example by centrifugation or filtration on a support whose porosity is adapted to the size of the cells collected.
- this concentration step is carried out for example by centrifugation so as to reach a density preferably greater than 10 9 cells / ml, value for which the Applicant company has obtained the mixture of branching enzymes from l starch with the best yield.
- the a-cellular extract is finally obtained from the unicellular algae concentrate by rupture of the membrane envelopes of the unicellular algae by any lysis method known to those skilled in the art, in particular mechanically, sonically, chemically or enzymatically.
- a mechanical lysis for example by grinding the concentrated single-cell algae with a FRENCH press and then filtration to remove insoluble debris.
- the third step of the process according to the invention consists in carrying out molecular sieving of this concentrated ⁇ -cellular extract so as to obtain the mixture of starch branching enzymes extracted from algae.
- This molecular sieving step can advantageously consist of a chromatographic separation or a separation on an ultrafiltration membrane, preferably a chromatographic separation on gel filtration.
- hydrophobic compounds capable of reducing the efficiency of the molecular sieving step.
- These hydrophobic compounds are mainly constituted by the chlorophyll pigments of the unicellular alga.
- the molecular sieving step makes it possible to fractionate all of the proteins, with or without enzymatic activities, extracted from the unicellular algae concentrate and recover the molecular weight fractions corresponding to the size of the starch branching enzymes, size usually between 70,000 and 90,000 daltons.
- a column of filtration gel is chosen, the support of which has a porosity which makes it possible to resolve proteins. whose molecular size is that of the starch branching enzymes extracted from algae.
- an allyl-dextran-sephacryl type gel filtration column can be used, with a fractionation range of 1,000 to 100,000 daltons, which thus results in a single pass in obtaining a mixture of enzymes where the branching activities starch is present in the first elution fractions.
- the measurement of the amylase activities, but also that of the starch branching activities, is carried out in each of the fractions collected.
- the process according to the invention in fact leads to a delayed elution of proteins with amylase activities to the benefit of enzymes with starch branching activities.
- an enzyme composition is thus obtained as a new product, characterized in that it contains a mixture of starch branching enzymes of type I and type II extracted from unicellular algae and in that 'it is significantly, even completely depleted in enzymes with amylase activities and starch debranching.
- the starch branching enzymes obtained as a mixture and contained in the enzymatic composition according to the invention will then make it possible to carry out the modification of the starches and / or its derivatives.
- the modification of a polyglucosylated structure of the amyiopectin type is firstly determined by measuring the variation in the wavelength of the maximum absorption of the complex formed between the modified amyiopectin and the iodine, relative to the wavelength of the unmodified amyiopectin control. A variation of more than one indicates a significant modification of the starting structure.
- the size of the glucosidic chains transferred to the amyiopectin is also measured by carrying out, in vi tro, the incubation of the amyiopectin with the mixture of starch branching enzymes extracted from algae, its treatment with isoamylase of so as to cleave all the connection points at 0-1.6, and the determination of the length of the chains thus released by chromatographic methods, for example by anion chromatography with amperometric detection. A comparison is then made of the lengths of chains thus obtained with those released from standard amyiopectin disconnected by the same technique, which makes it possible to characterize the modified amyiopectin.
- Chromatograms obtained by anion chromatography with amperometric detection usually indicate a majority of chains of DP 6, DP 7 and DP 8, with very little DP 1 to DP 5 for amyiopectin standard, whereas on the contrary a majority of chains from DP 1 to DP 5 are obtained for the modified amyiopectin.
- the distribution profiles of the lengths of chains transferred by the starch branching enzymes of higher plants average DP from 10 to 30 for starch branching enzymes of type I and average DP from 6 to 7 for starch branching enzymes type II
- the products obtained after modification by the mixture of starch branching enzymes extracted from algae are, to the knowledge of the Applicant company, new.
- Example 1 Obtaining a unicellular alga
- the strategy chosen is based on the introduction of a chromosomal plasmid insertion mutation in Chlamydomonas reinhardtii, following the protocol established by KINDLE et al., 1989, in The Journ. Cell Biol, 109., 2589-
- a 15 ml tube 0.5 ml of this cell suspension is mixed with 0.5 ml of glass beads. 1 mm in diameter and 10 ⁇ g of DNA constituted by the plasmid pARG7.8, into which has been introduced a 7.8 kbp sequence derived from the nuclear genome of Chlamydomonas reinhardtii and coding for the argino-succinate lyase.
- the tubes are then shaken vigorously for 1 min. After adding 10 ml of HSA medium supplemented with arginine, the cells are immediately transferred to a second tube, to remove the glass beads.
- the cells After centrifugation at 3000 g for 10 min, the cells are taken up in 400 ⁇ l of HSA medium and spread on HSA agar medium without arginine.
- the 15,000 transformants thus obtained which have become prototrophic for arginine, are then screened to find the strains deficient for the biosynthesis of starch. After 5 days of culture on a nitrogen deficiency agar medium, the colonies are stained with iodine vapor directly on the petri dish. The wild colonies appearing midnight blue, all the other transformants are selected. At the end of this mutagenesis, the strains of a new phenotype are isolated. These present a production of starch reduced to less than 0.1% of that accumulated in the wild strain. This original phenotype results from the alteration of the STA 7 gene, responsible for the synthesis of the starch disconnecting activity.
- Example 2 Culture of the mutant alga and production of the depigmented ⁇ -cell extract.
- Mutant alga is cultivated in medium HSA until reaching a cell density of 9.10 e cells / ml, characteristic of the stationary phase.
- the proteins of the extract are measured by the BRADFORD method (Assay kit marketed by the company BIO-RAD).
- the ⁇ -cellular extracts are subjected to a precipitation of the pigments by treatment with 50 ⁇ lJml of 10% protamine sulfate for 15 min in ice, then centrifuged again at 10,000 g for 15 min at 4 ° C in order to recover the supernatant .
- said supernatant is precipitated with 35% ammonium sulphate.
- the depigmentation and precipitation steps with ammonium sulphate led to the recovery of 75 mg of total protein, and made it possible to eliminate 50% of proteins other than enzymes starch connection.
- Example 3 Chromatographic separation and preparation of the mixture of starch branching enzymes extracted from algae.
- the 75 mg of proteins in 2 ml of sample are deposited on an SLC / Sephacryl 2.6 x 60 cm FPLC column of PHARMACIA on an allyl dextran support bridged with N, N 'methylene bis-acrylamide in spherical gel of 25 to 75 ⁇ m in diameter, characterized by its fractionation range between 1,000 and 100,000 daltons.
- the column outlet flow rate is fixed at 2 ml / min and fractions of 2 ml are collected by a collector of fractions marketed by the company PHARMACIA.
- the elution buffer used is an acetate buffer containing 50 mM sodium acetate and 10 mM dithiothreitol, the pH being adjusted to 6 with acetic acid.
- the branching activities are assayed in all the fractions collected by the indirect phosphorylase A assay method.
- the reaction is stopped by adding 800 ⁇ l of 10% trichloroacetic acid.
- the precipitates after one night at 4 ° C., are filtered on HATMAN paper with a porosity of 1 ⁇ m, rinsed with 5 ml of 5% trichloroacetic acid, with 5 ml of water, and finally with 5 ml of 70% ethanol. .
- Radioactive counting is carried out by a BECKMAN counter after placing the filters in counting flasks containing 3 ml of scintillating liquid.
- a branching enzyme unit is defined under such conditions as a nanomole of glucose-1-phosphate incorporated per minute.
- the assay of the amylase activities is then carried out on each fraction. 100 ⁇ l of each fraction will be subjected to protein denaturation at 100 ° C for 5 min in the presence of 1% sodium dodecyl sulfate and 5% mercaptoethanol in a final volume of 115 ⁇ l, then deposited on a polyacrylamide gel (30 / 1 of acrylamide / bis-acrylamide) at 7.5%, tris HC1 250 mM pH 8.8 and SDS 0.1%, containing 0.3% of soluble potato starch for analysis by following the technique called the starch zymogram.
- hydrolytic activities will cause local hydrolysis of the starch contained in the gel and are visualized after migration (electrophoresis of 70 min at 15 V cm-1; room temperature; buffer: 25 M tris-glycine pH 8.3, dithiothreitol 1 M, sodium dodecyl sulfate
- the color of the residual dextrins generated by the action of these enzymes provides information on the nature of the enzymatic activity detected.
- the first 8 fractions, representing 16 ml, for which the activity of branching enzymes is optimal (of the order of 17,340 units of branching activity), and the minimal amylastic activities (little or no amylastic activity visualized on gel) will constitute the mixture of starch branching enzymes extracted from the alga.
- Example 4 Modification of the corn amyiopectin by the mixture of starch branching enzymes extracted from the alga.
- the branching activities of the starch in the mixture of algae enzymes are estimated by measuring the wavelength of the maximum absorption of the complex formed by amyiopectin modified with iodine.
- 300 ⁇ l of enzyme mixture containing 131 units of branching activity are added to 10 ⁇ l of a 15 ⁇ g / ⁇ l solution of commercial corn amyiopectin obtained by dissolving 225 mg in 12 ml of 90% dimethyl sulfide for 10 min at 100 ° C, followed by precipitation with 36 ml of ethanol overnight at 4 ° C, centrifugation for 15 min at 4,000 g and resuspension in 15 ml of water, the pH being adjusted to 7 to promote branching reactions).
- the connected product is precipitated with 3 volumes of ethanol for 12 h at 4 ° C and then it is centrifuged at 10,000 g for 15 min at 4 ° C.
- the determination of the chain lengths resulting from the treatment of amyiopectin by the mixture of starch branching enzymes extracted from algae was carried out as follows: 17.6 mg of amyiopectin are incubated with 17000 units of activity of connection in a volume of 21 ml, adjusted to pH 7.5. After an incubation for 6 h. at 30 ° C., the connected product is precipitated with 3 volumes of ethanol overnight at 4 ° C. then it is centrifuged at 10,000 g for 15 min at 4 ° C.
- the hydrolysis tube is then placed in another REACTI-THERM water bath, with stirring, at a temperature of 45 ° C., then, after stabilization at this temperature, add 0.08 ml of IN sodium acetate buffer, brought to pH 3.5 with acetic acid. 5 ⁇ l of isoamylase are added at 59,000 U / ml (enzyme isolated from Pseudomonas amyloderamosa from HAYASHIBARA) and incubation is carried out at 45 ° C. for 2 h 30 min. The reaction is then stopped by bringing the reaction medium to 100 ° C for 3 min.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU56320/99A AU5632099A (en) | 1998-09-25 | 1999-09-23 | Method for preparing a mixture of starch branching enzymes extracted from algae |
CA002345331A CA2345331A1 (fr) | 1998-09-25 | 1999-09-23 | Procede de preparation d'un melange d'enzymes de branchement de l'amidon extraites d'algues |
EP99943032A EP1115843A1 (fr) | 1998-09-25 | 1999-09-23 | Procede de preparation d'un melange d'enzymes de branchement de l'amidon extraites d'algues |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR98/12051 | 1998-09-25 | ||
FR9812051A FR2783838B1 (fr) | 1998-09-25 | 1998-09-25 | Procede de preparation d'un melange d'enzymes de branchement de l'amidon extraites d'algues |
Publications (1)
Publication Number | Publication Date |
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WO2000018893A1 true WO2000018893A1 (fr) | 2000-04-06 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/FR1999/002261 WO2000018893A1 (fr) | 1998-09-25 | 1999-09-23 | Procede de preparation d'un melange d'enzymes de branchement de l'amidon extraites d'algues |
Country Status (5)
Country | Link |
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EP (1) | EP1115843A1 (fr) |
AU (1) | AU5632099A (fr) |
CA (1) | CA2345331A1 (fr) |
FR (1) | FR2783838B1 (fr) |
WO (1) | WO2000018893A1 (fr) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003018639A1 (fr) * | 2001-08-22 | 2003-03-06 | Supramol Parenteral Colloids Gmbh | Amylopectine hyperramifiee destinee a etre utilisee pour le traitement chirurgical ou therapeutique de mammiferes ou dans des procedes de diagnostic, et en particulier en tant que succedane de plasma |
FR2864088A1 (fr) * | 2003-12-19 | 2005-06-24 | Roquette Freres | Polymeres solubles de glucose hautement branches |
CN1303106C (zh) * | 2000-06-13 | 2007-03-07 | 罗凯脱兄弟公司 | 含有精选阳离子淀粉物质的淀粉组合物及其在造纸或非造纸方面的应用 |
CN100379808C (zh) * | 2000-06-13 | 2008-04-09 | 罗凯脱兄弟公司 | 含有阳离子淀粉物质的降解的淀粉组合物及其应用 |
EP2070951A1 (fr) | 2007-12-14 | 2009-06-17 | Fresenius Kabi Deutschland GmbH | Procédé de production d'un dérivé hydroxyalkyle de l'amidon avec deux liens |
EP2070950A1 (fr) | 2007-12-14 | 2009-06-17 | Fresenius Kabi Deutschland GmbH | Dérivés hydroxyalkylés de l'amidon et leur procédé de préparation |
US7550446B2 (en) | 2002-08-16 | 2009-06-23 | Fresenius Kabi Deutschland Gmbh | Highly branched, unsubstituted or low-substituted starch products, dialysis solution and plasma expander containing the same, and the use thereof |
WO2012004004A1 (fr) | 2010-07-09 | 2012-01-12 | Fresenius Kabi Deutschland Gmbh | Dérivés d'hydroxyalkyl-amidon délivrant de l'oxyde nitrique |
EP2455436A1 (fr) | 2010-11-15 | 2012-05-23 | Agrana Stärke GmbH | Composition de colle à base d'amidon |
WO2014076435A1 (fr) | 2012-11-16 | 2014-05-22 | Roquette Freres | Procédé de potabilisation |
US8840879B2 (en) | 2004-03-11 | 2014-09-23 | Fresenius Kabi Deutschland Gmbh | Conjugates of hydroxyalkyl starch and a protein |
US8916518B2 (en) | 2002-03-06 | 2014-12-23 | Fresenius Kabi Deutschland Gmbh | Coupling proteins to a modified polysaccharide |
WO2015114254A1 (fr) | 2014-01-29 | 2015-08-06 | Roquette Frères | Procédé de traitement de l'eau |
CN108315374A (zh) * | 2018-01-18 | 2018-07-24 | 齐鲁工业大学 | 一种超高分支变性淀粉颗粒的绿色制备方法 |
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EP1943908A1 (fr) * | 2006-12-29 | 2008-07-16 | Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO | Nouveau glucide de stockage à digestion lente |
CN106190998B (zh) * | 2016-08-25 | 2019-09-03 | 江南大学 | 一种提高淀粉分支酶活力的方法 |
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EP0418945A1 (fr) * | 1989-08-23 | 1991-03-27 | Coöperatieve Verkoop- en Productievereniging van Aardappelmeel en Derivaten 'AVEBE' B.A. | Enzyme branchante et son utilisation |
-
1998
- 1998-09-25 FR FR9812051A patent/FR2783838B1/fr not_active Expired - Fee Related
-
1999
- 1999-09-23 EP EP99943032A patent/EP1115843A1/fr not_active Withdrawn
- 1999-09-23 AU AU56320/99A patent/AU5632099A/en not_active Abandoned
- 1999-09-23 WO PCT/FR1999/002261 patent/WO2000018893A1/fr not_active Application Discontinuation
- 1999-09-23 CA CA002345331A patent/CA2345331A1/fr not_active Abandoned
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EP0418945A1 (fr) * | 1989-08-23 | 1991-03-27 | Coöperatieve Verkoop- en Productievereniging van Aardappelmeel en Derivaten 'AVEBE' B.A. | Enzyme branchante et son utilisation |
Non-Patent Citations (3)
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DELRUE B ET AL: "WAXY CHLAMYDOMONAS REINHARDTII: MONOCELLULAR ALGAL MUTANTS DEFECTIVE IN AMYLOSE BIOSYNTHESIS AND GRANULE-BOUND STARCH SYNTHASEACTIVITY ACCUMULATE A STRUCTURALLY MODIFIED AMYLOPECTIN", JOURNAL OF BACTERIOLOGY, vol. 174, no. 11, 1 June 1992 (1992-06-01), pages 3612 - 3620, XP000673929, ISSN: 0021-9193 * |
FONTAINE T ET AL: "Toward an understanding of the biogenesis of the starch granule. Evidence that Chlamydomonas soluble starch synthase II controls the synthesis of intermediate size glucans of amylopectin.", JOURNAL OF BIOLOGICAL CHEMISTRY., vol. 268, no. 22, 5 August 1993 (1993-08-05), AMERICAN SOCIETY OF BIOLOGICAL CHEMISTS, BALTIMORE, MD., US, pages 16223 - 16230, XP002108225, ISSN: 0021-9258 * |
MOUILLE G ET AL: "Preamylopectin processing: A mandatory step for starch biosynthesis in plants", PLANT CELL., vol. 8, August 1996 (1996-08-01), AMERICAN SOCIETY OF PLANT PHYSIOLOGISTS, ROCKVILLE, MD., US, pages 1353 - 1366, XP002108226, ISSN: 1040-4651 * |
Cited By (19)
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CN1303106C (zh) * | 2000-06-13 | 2007-03-07 | 罗凯脱兄弟公司 | 含有精选阳离子淀粉物质的淀粉组合物及其在造纸或非造纸方面的应用 |
CN100379808C (zh) * | 2000-06-13 | 2008-04-09 | 罗凯脱兄弟公司 | 含有阳离子淀粉物质的降解的淀粉组合物及其应用 |
CN100390203C (zh) * | 2001-08-22 | 2008-05-28 | 超分子非肠道胶体有限公司 | 在外科或治疗性治疗哺乳动物的方法中或在诊断方法中使用的高支化支链淀粉 |
US7393841B2 (en) | 2001-08-22 | 2008-07-01 | Supramol Parenteral Colloids Gmbh | Hyperbranched amylopectin for use in methods for surgical or therapeutic treatment of mammals or in diagnostic methods, especially for use as a plasma volume expander |
WO2003018639A1 (fr) * | 2001-08-22 | 2003-03-06 | Supramol Parenteral Colloids Gmbh | Amylopectine hyperramifiee destinee a etre utilisee pour le traitement chirurgical ou therapeutique de mammiferes ou dans des procedes de diagnostic, et en particulier en tant que succedane de plasma |
US8916518B2 (en) | 2002-03-06 | 2014-12-23 | Fresenius Kabi Deutschland Gmbh | Coupling proteins to a modified polysaccharide |
US7550446B2 (en) | 2002-08-16 | 2009-06-23 | Fresenius Kabi Deutschland Gmbh | Highly branched, unsubstituted or low-substituted starch products, dialysis solution and plasma expander containing the same, and the use thereof |
FR2864088A1 (fr) * | 2003-12-19 | 2005-06-24 | Roquette Freres | Polymeres solubles de glucose hautement branches |
EP1548033A2 (fr) * | 2003-12-19 | 2005-06-29 | Roquette FrÀ¨res | Polymères solubles de Glucose hautement branchés |
EP1548033A3 (fr) * | 2003-12-19 | 2005-10-26 | Roquette FrÀ¨res | Polymères solubles de Glucose hautement branchés |
US7612198B2 (en) | 2003-12-19 | 2009-11-03 | Roquette Freres | Soluble highly branched glucose polymers |
US8840879B2 (en) | 2004-03-11 | 2014-09-23 | Fresenius Kabi Deutschland Gmbh | Conjugates of hydroxyalkyl starch and a protein |
EP2070951A1 (fr) | 2007-12-14 | 2009-06-17 | Fresenius Kabi Deutschland GmbH | Procédé de production d'un dérivé hydroxyalkyle de l'amidon avec deux liens |
EP2070950A1 (fr) | 2007-12-14 | 2009-06-17 | Fresenius Kabi Deutschland GmbH | Dérivés hydroxyalkylés de l'amidon et leur procédé de préparation |
WO2012004004A1 (fr) | 2010-07-09 | 2012-01-12 | Fresenius Kabi Deutschland Gmbh | Dérivés d'hydroxyalkyl-amidon délivrant de l'oxyde nitrique |
EP2455436A1 (fr) | 2010-11-15 | 2012-05-23 | Agrana Stärke GmbH | Composition de colle à base d'amidon |
WO2014076435A1 (fr) | 2012-11-16 | 2014-05-22 | Roquette Freres | Procédé de potabilisation |
WO2015114254A1 (fr) | 2014-01-29 | 2015-08-06 | Roquette Frères | Procédé de traitement de l'eau |
CN108315374A (zh) * | 2018-01-18 | 2018-07-24 | 齐鲁工业大学 | 一种超高分支变性淀粉颗粒的绿色制备方法 |
Also Published As
Publication number | Publication date |
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FR2783838B1 (fr) | 2000-12-01 |
FR2783838A1 (fr) | 2000-03-31 |
CA2345331A1 (fr) | 2000-04-06 |
EP1115843A1 (fr) | 2001-07-18 |
AU5632099A (en) | 2000-04-17 |
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