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In general, β-1,3 linkages are created by 1,3-beta-glucan synthase, and β-1,4 linkages are created by cellulose synthase. The process leading to β-1,6 linkages is poorly understood: although genes important in the process have been identified, not much is known about what each of them do. [9]
Mixed-linkage glucan (MLG), sometimes incorrectly referred to as beta-glucan, is a hemicellulosic polysaccharide consisting of β-D(1-3) and β-D(1-4) linked glucosyl residues. MLG is highly prevalent within the Poales , where it has important properties in the diet .
Zymosan is a beta-glucan with repeating glucose units connected by β-1,3-glycosidic linkages. It binds to TLR 2 and Dectin-1 . Zymosan is a ligand found on the surface of fungi, like yeast. [1] Zymosan is prepared from yeast cell walls and consists of protein-carbohydrate complexes.
Mechanism for cleaving of alpha-1,6 linkage. Amylo-α-1,6-glucosidase (EC 3.2.1.33), or glucosidase, cleaves the remaining alpha-1,6 linkage, producing glucose and a linear chain of glycogen. [10] The mechanism by which the glucosidase cleaves the α -1,6-linkage is not fully known because the amino acids in the active site have not yet been ...
β-1,3-glucanase, an enzyme in plants that breaks down β-1,3-glucans such as callose or curdlan; β-1,6 glucanase, an enzyme that breaks down β-1,6-glucans; Cellulase, an enzyme that perform the hydrolysis of 1,4-beta-D-glycosidic linkages in cellulose, lichenin and cereal β-D-glucans. [2] Xyloglucan-specific endo-beta-1,4-glucanase
The enzyme glucan 1,4-β-glucosidase (EC 3.2.1.74), also known as 4-β-D-glucan glucohydrolase, catalyses the hydrolysis of (1→4)-linkages in 1,4-β-D-glucans and related oligosaccharides, removing successive glucose units.
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1,4-alpha-glucan-branching enzyme, also known as brancher enzyme or glycogen-branching enzyme is an enzyme that in humans is encoded by the GBE1 gene. [ 5 ] Glycogen branching enzyme is an enzyme that adds branches to the growing glycogen molecule during the synthesis of glycogen , a storage form of glucose .