| dextrin | <chemistry> A translucent, gummy, amorphous substance, nearly tasteless and odorless, used as a substitute for gum, for sizing, etc, and obtained from starch by the action of heat, acids, or diastase. It is of somewhat variable composition, containing several carbohydrates which change easily to their respective varieties of sugar. It is so named from its rotating the plane of polarization to the right; called also British gum, Alsace gum, gommelin, leiocome, etc. See Achroodextrin, and Erythrodextrin. Origin: Cf. F. Dextrine, G. Dextrin. See Dexter. Source: Websters Dictionary (01 Mar 1998) |
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| dextrin 6-alpha-d-glucosidase | <enzyme> Catalyses endohydrolysis of 1,6-alpha-d-glucoside linkages at points of branching in chains of 1,4-linked alpha-d-glucose residues Registry number: EC 3.2.1.33 (26 Jun 1999) |
| dextrin 6-glucosyltransferase | A glucosyltransferase transferring 1,4-alpha-d-glucosyl residues, thus catalyzing the synthesis of dextrans (with 1,6 links between monosaccharide units) from dextrins (with 1,4 links) by glucose transfer. Synonym: dextrin-dextran transglucosidase, dextrin 6-glucosyltransferase. (05 Mar 2000) |
| dextrin dextranase | A glucosyltransferase transferring 1,4-alpha-d-glucosyl residues, thus catalyzing the synthesis of dextrans (with 1,6 links between monosaccharide units) from dextrins (with 1,4 links) by glucose transfer. Synonym: dextrin-dextran transglucosidase, dextrin 6-glucosyltransferase. (05 Mar 2000) |
| dextrin glycosyltransferase | Dextrin transglycosylase or glycosyltransferase;a 4-glycosyltransferase converting maltodextrins into amylose and glucose by transferring parts of 1,4-glucan chains to new 4-positions on glucose or other 1,4-glucans. Synonym: amylomaltase, D enzyme, dextrin glycosyltransferase, dextrin transglycosylase, disproportionating enzyme. (05 Mar 2000) |
| dextrin limit | The polysaccharide fragments remaining at the end (limit) of exhaustive hydrolysis of amylopectin or glycogen by alpha-1,4-glucan maltohydrolase, which cannot hydrolyze the alpha-1,6 bonds at branch points; accumulates in individuals with type III glycogen storage disease. Synonym: dextrin limit. (05 Mar 2000) |
| dextrin transglycosylase | Dextrin transglycosylase or glycosyltransferase;a 4-glycosyltransferase converting maltodextrins into amylose and glucose by transferring parts of 1,4-glucan chains to new 4-positions on glucose or other 1,4-glucans. Synonym: amylomaltase, D enzyme, dextrin glycosyltransferase, dextrin transglycosylase, disproportionating enzyme. (05 Mar 2000) |
| dextrin-dextran transglucosidase | A glucosyltransferase transferring 1,4-alpha-d-glucosyl residues, thus catalyzing the synthesis of dextrans (with 1,6 links between monosaccharide units) from dextrins (with 1,4 links) by glucose transfer. Synonym: dextrin-dextran transglucosidase, dextrin 6-glucosyltransferase. (05 Mar 2000) |
| dextrinase | Any of the enzymes catalyzing the hydrolysis of dextrins; e.g., amylo-1,6-glucosidase, dextrin dextranase. (05 Mar 2000) |
| dextrinogenic | Capable of producing dextrin. (05 Mar 2000) |
| dextrinosis | Synonym: glycogenosis. (05 Mar 2000) |
| dextrinuria | The passage of dextrin in the urine. (05 Mar 2000) |
| dextrinyltransferase | <enzyme> Catalyses transfer of dextrinyl groups to glucose, maltose, or maltodextrins; activity similar to that of amylomaltase; point mutation converts maltodextrin glucosidase to this type of enzyme Registry number: EC 2.4.1.- (26 Jun 1999) |
| acid dextrin | The product of acid and heat treatment of dextrin. (05 Mar 2000) |
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| alpha-dextrin endo-1,6-alpha-glucosidase | <enzyme> An enzyme with action similar to that of isoamylase; it cleaves 1,6-alpha-glucosidic linkages in pullalan, amylopectin, and glycogen, and in alpha-and beta-amylase limit-dextrins of amylopectin and glycogen. Compare: isoamylase. Synonym: limit dextrinase, pullulanase, R enzyme. (05 Mar 2000) |
| iron dextrin | A complex of dextrin with ferric hydroxide; used intravenously in the treatment of iron deficiency. (05 Mar 2000) |
| limit dextrin | The polysaccharide fragments remaining at the end (limit) of exhaustive hydrolysis of amylopectin or glycogen by alpha-1,4-glucan maltohydrolase, which cannot hydrolyze the alpha-1,6 bonds at branch points; accumulates in individuals with type III glycogen storage disease. Synonym: dextrin limit. (05 Mar 2000) |