Molecular Components in the Granule

Amylose is synthesized by granular-bound starch synthase, whereas amylopectin is synthesized by soluble starch synthase (Chapter 4).334,339 Because amylose is synthesized by the granular-bound starch synthase in a progressive manner,340 the amylose molecule is likely confined in the granule and has little opportunity to interact and form double helices with other starch molecules to facilitate branch formation. Branching reactions do occur on some amylose molecules, but at a much lower frequency than with amylopectin, and result in slightly branched amylose molecules. 

Remaining granular starch after 80% chemical gelatinization Chemically gelatinized surface starch (20% chemical gelatinization) 

Imberty A, Buleon A, Tran Y Perez S. Starch/Starke. 1991 43 375. 

French D. In Whistler RL, BeMiller JN, Paschall EF, eds. Starch Chemistry and Technology. 2nd edn. Orlando, FL Academic Press 1984 183. 

Hizukuri S. In Eliasson A-C, ed. Carbohydrates in Food. New York, NY Marcel Dekker 1996 347. 

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