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Clinical pharmacy PharmD program Third level Phytochemistry-1 (PG-504)

-Amylase: “Exo-amylase” “Malt, Diastase”

It hydrolyses starch by removing maltose units from the non-reducing ends

of the polysaccharide molecules by splitting of -1, 4 glucosidic linkages.

Because the hydrolytic action on amylopectin continues until a branched

point (1, 6 bond) is reached, the reaction stops, leaving a polysaccharide fragment

known as dextrin.

-Amylase = [1,4-Linkage Exoamylase]

-Amylase [1,4-Linkage Exoamylase]

Amylose
1 2 3 4 5 Splitting Maltose

N R

Amylopectin

N R
Dextrin ca. 60 %

Maltose ca. 40 %

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