Abstract
IT is generally agreed that the iodine-staining polysaccharide isolated from many red algae is a glucan of the amylopectin type in which the chain-forming links are α-1 : 4 and the branch links, α-1 : 6-glucosidic. The floridean starch from Dilsea edulis appears to differ, in finer details of structure, from one sample to another. This difference turns mainly on the presence or the absence of a third type of link, namely, the 1 : 3-glucosidic linkage1. The majority of investigations favour the view that 1 : 3-glucosidic linkages are in fact not present in Dilsea starch2. We therefore think it desirable to record some observations made in the course of a comprehensive linkage analysis of floridean starch which establish that a small proportion of 1 : 3-links is an integral part of the starch structure and, moreover, that these links have the α-configuration.
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PEAT, S., TURVEY, J. & MÔN EVANS, J. Isolation of Nigerose from Floridean Starch. Nature 179, 261–262 (1957). https://doi.org/10.1038/179261b0
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DOI: https://doi.org/10.1038/179261b0
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