Abstract
ABSTRACTThe extracellular starch released by autolysis of glycerol‐grown Chroomonas salina (Wislouch) Butcher was purified and chemically characterized. It contained 99%D‐glucose, formed a blue complex (λmax at 605 nm) with iodine, and showed an optical rotation value more positive than that of potato starch. Methylation analysis established the presence of 1,4‐ and 1,4,6‐glucoside linkages in the proportion 15:1. These properties indicate the cryptomonad starch to be an iodophilic α‐(1,4)‐glucan, composed of ca. 30% amylose with amylopectin, and broadly resembling potato, Chilomonas and other unicellular algal starches.
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