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GLUCOSE ISOMERASE [9 records]

Record 1 2013-08-22

English

Subject field(s)
  • Biochemistry
  • Molecular Biology
DEF

An enzyme of the isomerase class requiring the presence of the intermediate glucose 1, 6-bisphosphate to catalyze the interconversion of glucose 1-phosphate and glucose 6-phosphate, a step in the formation and utilization of glycogen.

Key term(s)
  • glucophosphomutase

French

Domaine(s)
  • Biochimie
  • Biologie moléculaire
DEF

Enzyme qui catalyse de façon réversible le transfert du radical phosphorique du C1 au C6 du glucose.

OBS

La glucophosphomutase existe dans toutes les cellules et joue un rôle dans la glycogénolyse et la glycogénèse.

Spanish

Save record 1

Record 2 2012-02-03

English

Subject field(s)
  • Biological Sciences
DEF

Enzyme that catalyzes the interconversion of the pentoses xylose and xylulose. The enzyme occurs in a large number of microorganisms and has been developed commercially for use as a glucose isomerase.

French

Domaine(s)
  • Sciences biologiques

Spanish

Save record 2

Record 3 2011-12-12

English

Subject field(s)
  • Sugar Industry
DEF

Any of a group of corn syrups that has undergone enzymatic processing to convert its glucose into fructose and has then been mixed with pure corn syrup (100% glucose) to produce a desired sweetness.

CONT

The usual use for glucose isomerase is to take glucose made by hydrolysis of corn starch and turn it into a mixture of mostly fructose with some glucose. The corn starch is broken down using amylases. The result is called "high fructose corn syrup(HFCS). "

OBS

"High-fructose corn syrup" is often used as a synonym for "isosyrup" since it is the main type of isosyrup.

OBS

On food labels, you may see HFCS called "glucose-fructose."

Key term(s)
  • glucose fructose

French

Domaine(s)
  • Sucrerie (Industrie de l'alimentation)
DEF

[...] sirop de maïs qui a été soumis à des processus enzymatiques en vue d'augmenter sa teneur en fructose et ensuite mélangé à du sirop de maïs pur (100 % de glucose) pour obtenir sa composition finale.

OBS

Bien que les sirops de glucose peuvent techniquement être à base de différentes sources de fécule (maïs, riz, pomme de terre, blé, etc.), ils sont généralement à base de fécule de maïs. C'est la raison pour laquelle les termes «sirop de glucose à haute teneur en fructose» et «sirop de maïs à haute teneur en fructose» sont souvent utilisés de façon interchangeable.

OBS

Sur l’emballage des aliments, le sirop de glucose à haute teneur en fructose est souvent appelé «glucose-fructose».

Key term(s)
  • glucose fructose

Spanish

Campo(s) temático(s)
  • Industria azucarera
Save record 3

Record 4 2011-01-12

English

Subject field(s)
  • Biological Sciences
  • Biotechnology
DEF

Positively charged resin used in ion-exchange chromatography to which diethylaminoethyl groups have been attached.

CONT

Although some of the earliest reports on immobilising enzymes refer to inorganic supports, in the next phase of development organic polymers were favoured. This was probably due both to the rapid development of interest in enzyme structure and the chemical modification of enzymes, and to the ease with which enzymes could be attached to organic polymers such as cellulose. This was achieved by adsorption(to DEAE-cellulose), and by covalent bonding.... Glucose isomerase has been immobilized through sorption from water solutions by anion exchange celluloses such as diethylaminoethyl(DEAE) cellulose and... pyruvate kinase bound to diethylaminoethylcellulose(DEAE-cellulose) via cyanuric chloride.

Key term(s)
  • diethylaminoethyl cellulose
  • DEAE-cellulose

French

Domaine(s)
  • Sciences biologiques
  • Biotechnologie
DEF

Cellulose chargée positivement utilisée comme échangeuse d'anions dans la séparation chromatographique des protéines.

CONT

Les protéines peuvent être fractionnées grâce à la chromatographie par échange d'ions. On utilise souvent dans ce but des celluloses modifiées qui sont, soit des échangeurs d'anion comme la diéthylaminoéthyl-cellulose (DEAE-cellulose), soit des échangeurs de cations comme la carboxyméthyl-cellulose (CM-cellulose).

Key term(s)
  • DEAE-cellulose
  • cellulose diéthylaminoéthylique

Spanish

Campo(s) temático(s)
  • Ciencias biológicas
  • Biotecnología
Save record 4

Record 5 1998-09-22

English

Subject field(s)
  • Biochemistry
  • Biotechnology
CONT

The "isomerase cake" and details or operation are being marketed by Nagasi and Co. Ltd, Japan. The Japanese process uses enzymes known as glucose isomerases.... these are xylose isomerases adapted to use glucose. The organisms are cultivated in a medium containing xylose or xylan.

French

Domaine(s)
  • Biochimie
  • Biotechnologie
OBS

Isomérase : Enzyme qui catalyse des réarrangements intramoléculaires.

Spanish

Campo(s) temático(s)
  • Bioquímica
  • Biotecnología
Save record 5

Record 6 1990-01-03

English

Subject field(s)
  • Biological Sciences
CONT

A variety of enzymes have now been adsorbed to modified celluloses(DEAE) which, in two instances, have led to the development of major industrial-scale immobilized enzyme processes. In one case Tosa et al. brought to industrial scale a process in which various amino acylases adsorbed to DEAE cellulose or DEAE Sephadex are employed to convert tonnage quantities of synthetic DL amino acids to the biologically available L-form. Most recently, a process utilizing glucose isomerase adsorbed to DEAE cellulose has been patented and used in the full-scale conversion of corn syrup sugar to fructose.

French

Domaine(s)
  • Sciences biologiques
CONT

La chromatographie sur des celluloses modifiées est un procédé récent, qui a trouvé de nombreuses applications. Il existe deux types de celluloses : les échangeurs d'anions et les échangeurs de cations. Les plus employées sont la diéthylaminoéthyl-cellulose et la carboxyméthyl-cellulose (DEAE- et CM-cellulose).

Spanish

Save record 6

Record 7 1985-10-24

English

Subject field(s)
  • Biochemistry
  • Food Additives
CONT

A major recent development has been the combination of three microbially produced enzymes-alpha-amylase, glucamylase and glucose isomerase-to obtain a high-fructose sweetening agent from cornstarch.

CONT

Glucoamylase ... [is obtained from] Aspergillus niger var; Aspergilus orizae var; Rhizopus orizae var; [it is used in] ale; beer; light beer; malt liquor; ... bread; flour; whole wheat flour; chocolate syrups; distillers’ mash ...

French

Domaine(s)
  • Biochimie
  • Additifs alimentaires
CONT

Un développement récent et important est la combinaison de trois enzymes d'origine microbienne - l'alpha-amylase, la glucoamylase et la glucose isomérase - pour obtenir un composé édulcorant à haute teneur en fructose à partir d'amidon de maïs.

Spanish

Save record 7

Record 8 1985-05-10

English

Subject field(s)
  • Biochemistry
CONT

Recent applications of microbially produced enzymes include the use of amylases in brewing, baking and the manufacture of textiles; of proteases in brewing, meat tenderizing and the manufacture of detergents and leather, and of rennin in cheesemaking. A major recent development has been the combination of three microbially produced enzymes-alpha-amylase, glucamylase and glucose isomerase-to obtain a high-fructose sweetening agent from cornstarch.

French

Domaine(s)
  • Biochimie
CONT

Parmi les applications récentes des enzymes produites par voie microbienne, citons l'utilisation d'amylases dans la brasserie, la boulangerie et les industries textiles, de protéases dans la brasserie, pour attendrir la viande, et dans la fabrication du cuir et des détergents; et enfin de rennine dans la fromagerie. Un développement récent et important est la combinaison de trois enzymes d'origine microbienne - l'alpha-amylase, la glucoamylase et la glucose isomérase - pour obtenir un composé édulcorant à haute teneur en fructose à partir d'amidon de maïs.

Spanish

Save record 8

Record 9 1985-05-09

English

Subject field(s)
  • Microbiology and Parasitology
CONT

During the last decade, large-scale techniques for extraction of intracellular microbial protein have been developed but, at present, only a few intracellular microbial enzymes, e. g. glucose isomerase and penicillin acylase, are isolated on a large scale.

French

Domaine(s)
  • Microbiologie et parasitologie
CONT

Au cours de la dernière décennie, on a mis au point des techniques à grande échelle pour l'extraction de protéines microbiennes intracellulaires, mais on ne peut actuellement isoler en grande quantité qu'un petit nombre d'enzymes microbiennes intracellulaires comme la glucose isomérase et la pénicilline acylase.

Spanish

Save record 9

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