Abstract
Sugar constituents of the fucose-containing polysaccharides (FCPs) from 21 species of brown algae were analyzed. FCPs were extracted with hot water (100 °C, 4 h), separated by precipitation with 20% (v: v) ethanol in the presence of 0.05 M MgCl2 to remove contaminating soluble alginate, and purified by DEAE-Sephadex column chromatography. The samples were hydrolyzed with HCl, and neutral sugar and uronic acid were separated by anion exchange chromatography. Their amounts were determined by gas-liquid chromatography. The neutral sugars in the FCPs from Ishige okamurae, Laminaria ochotensis, Myelophycus simplex, Padina arborescens and Sargassum thunbergii all contained arabinose, fucose, galactose, glucose, mannose, rhamnose and xylose residues. The FCPs from Ishige okamurae, Padina arborescens, Sargassum hemiphyllum, S. patents and S. sagamianum contained the four uronic acids, galacturonic acid, glucuronic acid, guluronic acid and mannuronic acid.Key wordsbrown algaefucose-containing polysaccharideneutral sugarseaweeduronic acid
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