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α-Amylase is an enzyme (EC 3.2.1.1; systematic name 4-α-D-glucan glucanohydrolase) that hydrolyses α bonds of large, α-linked polysaccharides, such as starch and glycogen, yielding shorter chains thereof, dextrins, and maltose, through the following biochemical process: [2]
Another form of amylase, β-amylase (EC 3.2.1.2 ) (alternative names: 1,4-α-D-glucan maltohydrolase; glycogenase; saccharogen amylase) is also synthesized by bacteria, fungi, and plants. Working from the non-reducing end, β-amylase catalyzes the hydrolysis of the second α-1,4 glycosidic bond, cleaving off two glucose units at a
A Pancreatic alpha-Amylase 1HNY, a glycoside hydrolase In biochemistry , glycoside hydrolases (also called glycosidases or glycosyl hydrolases ) are a class of enzymes which catalyze the hydrolysis of glycosidic bonds in complex sugars .
In molecular biology, glycoside hydrolase family 13 is a family of glycoside hydrolases. Glycoside hydrolases EC 3.2.1. are a widespread group of enzymes that hydrolyse the glycosidic bond between two or more carbohydrates, or between a carbohydrate and a non-carbohydrate moiety. A classification system for glycoside hydrolases, based on ...
Glucosidases are the glycoside hydrolase enzymes categorized under the EC number 3.2.1. [1] ... β-Amylase: EC 3.2.1.2 : is a plant enzyme to break down starch: γ ...
Glucan 1,4-α-glucosidase (EC 3.2.1.3, glucoamylase, amyloglucosidase, γ-amylase, lysosomal α-glucosidase, acid maltase, exo-1,4-α-glucosidase, glucose amylase, γ-1,4-glucan glucohydrolase, acid maltase, 1,4-α-D-glucan glucohydrolase) is an enzyme located on the brush border of the small intestine with systematic name 4-α-D-glucan glucohydrolase.
Glycoside hydrolase family 14 CAZY GH_14 comprises enzymes with only one known activity; beta-amylase (EC 3.2.1.2). A Glu residue has been proposed as a catalytic residue, but it is not known if it is the nucleophile or the proton donor.
Depending on whether the glycosidic bond lies "below" or "above" the plane of the cyclic sugar molecule, glycosides are classified as α-glycosides or β-glycosides. Some enzymes such as α-amylase can only hydrolyze α-linkages; others, such as emulsin , can only affect β-linkages.
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