Structural features of the sulphated polysaccharide from a green seaweed, Spongomorpha indica.
A sulphated heteropolysaccharide, [alpha]D +59 degrees, was isolated from a green seaweed, Spongomorpha indica, by extraction with ammonium oxalate. The polymer is composed of arabinose, xylose, galactose and glucose in the ratio 8.9:1.0:12.0:1.0. Studies showed that the polysaccharide is a complex and multilinked polymer containing arabinose in both furanose and pyranose forms. The core of the polysaccharide is composed of 1,4-linked galactose units. The arabinofuranose units are present as non-reducing end units, as well as jointed through 1,3- and 1,2-linkages. The majority of the arabinopyranose units are joined through 1,4-linkages. Xylose is present as a branch terminating unit. Glucose is joined through 1,4-linkages. Both arabinose and galactose carry branches. Sulphate groups are present on some of the arabinose units at C-2 and on some of the galactose units at C-2 and C-3.
Department of Pharmaceutical Sciences, Andhra University, Visakhapatnam, India.
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Rao
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Sri Ramana
D002240:Carbohydrate Sequence; D000460:Chlorophyta / Q000032:analysis*; D006868:Hydrolysis; D008745:Methylation; D008969:Molecular Sequence Data; D010084:Oxidation-Reduction; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification; D013431:Sulfates / Q000737:chemistry* / Q000302:isolation & purification
D011134:Polysaccharides; D013431:Sulfates