Question

How do the alpha and beta amylases derived from cereal grain compare as to the following:...

How do the alpha and beta amylases derived from cereal grain compare as to the following: a, Types of linkages hydrolyzed b. Source of each c. Mode of action on amylopectin and glycogen

Homework Answers

Answer #1

Alpha amylases

Beta amylases

A) Types of linkages hydrolyzed

Endohydrolysis of (1->4)-alpha-D-glucosidic linkages in polysaccharides containing three or more (1->4)-alpha-linked D-glucose units.

Hydrolysis of (1->4)-alpha-D-glucosidic linkages in polysaccharides(non reducing end)

B) Source of each

Wheat,Rye,Rice,Corn

Barley,Maize,Malt

C) Mode of action

Amylopectin

Glycogen

Can break it anywhere in chain, therefore more significant in conversion of starch,Can skip 1,6 bonds

Can break anywhere on it to maltose by breaking at 1,4 bond

Can only break it from open end 1,4. Not at branching

Can only break it from open end 1,4. Not at branching

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