Ian J. Miller, Jean Mollion
Evaluation of the structures of galactans from Carpopeltis sp., a member of the Halymeniales in the western Indian Ocean
The polysaccharides from an aqueous extract of a Carpopeltis species from the southeastern coast of Madagascar were examined by 13C NMR spectroscopy. Over 80% of these polysaccharides comprised 3-linked D-galactose units that were non-substituted, 4-sulfated or 4,6-pyruvylated, and these alternated with 4-linked 3,6-anhydro-D-galactose units, some of which may have been 2-sulfated. There were also 4-linked 3,6-anhydro-L-galactose units present, which alternated primarily with 3-linked galactose-2-sulfate units. The natural extract contained 4-linked D-and L-galactose, many, but not all of which, were 6-sulfated and hence anhydrogalactose precursors, and there were minor components containing 2-O-methylanhydrogalactose, 6-O-methylgalactose, xylose, 2-O-methylgalactose, 3/4-O-methylgalactose. This is the first characterization of the galactans from a Carpopeltis species.
Botanica Marina, Walter de Gruyter
Print ISSN: 0006-8055
Volume: 49, 02/2006
Pages: 79 - 85
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