The commonest digestible polysaccharide in plants is starch, and it can exist in two forms, amylose and amylopectin, both of which are polymers of D-glucose.
The amylose molecule is a linear, unbranched structure in which the glucose residues are attached solely through a-1,4 glycosidic bonds.
Amylopectin, on the a other hand, is a branched-chain polymer, the branch points occurring through a-1,6 glycosidic bonds.
The Starch