Chemistry of the polysaccharides of the diatom Coscinodiscus nobilis |
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Authors: | Elizabeth Percival M. Anisur Rahman Helmut Weigel |
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Affiliation: | The Bourne Laboratory, Royal Holloway College, (University of London), Egham, Surrey, TW20 0EX, U.K. |
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Abstract: | The extracellular polysaccharide of Coscinodiscus nobilis, a member of the Coscinodiscaceae, contains a highly branched heteropolysaccharide(s) containing fucose, rhamnose, mannose, d-glucose, xylose, d-glucuronic acid, galactose (trace) and half ester sulphate. The positions of linkages between the monosaccharides have been established and evidence for the linkages between d-glucuronic acid and monosaccharides was obtained. The extracellular polysaccharide contained also a chrysolaminaran, but this may have been derived from dead cells. Fucose and mannose occur also in a separate polymer. The diatom contained polysaccharide material consisting of glucose, mannose, fucose and uronic acid residues. |
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Keywords: | Coscinodiscaceae diatom extracellular polysaccharide chrysolaminaran |
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