Some structural features of sargassan,a sulphated heteropolysaccharide from Sargassum linifolium |
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Authors: | AFouad Abdel-Fattah MMagdel-Din Hussein HMohamed Salem |
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Institution: | Laboratory of Microbiological Chemistry, National Research Centre, Dokki, Cairo, and Department of Biochemistry, Faculty of Agriculture, Cairo University, Giza Egypt |
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Abstract: | The acid-extractable, water-soluble, sulphated heteropolysaccharide, sargassan, contains residues of D-glucuronic acid, D-mannose, D-galactose, D-xylose, and L-fucose, and a protein moiety. Partial, acid hydrolysis of sargassan and auto-hydrolysis of the free-acid polysaccharide have been studied. Several acidic and neutral oligosaccharides were subsequently isolated. Evidence is advanced for the presence of ester sulphate on some galactose and fucose residues. It is concluded that the carbohydrate moiety of sargassan involves a backbone chain of D-glucuronic acid and D-mannose residues, and side chains involving residues of D-galactose, D-xylose, and L-fucose with sulphate attached to some galactose and fucose residues. |
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