A polysaccharide fraction from the red seaweed Champia novae-zealandiae Rhodymeniales,Rhodophyta |
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Authors: | Miller Ian J Falshaw Ruth Furneaux Richard H |
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Institution: | (1) Carina Chemical Laboratories Ltd., P O Box 30-366, Lower Hutt, New Zealand;(2) Industrial Research Ltd, P O Box 31-310, Lower Hutt, New Zealand |
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Abstract: | The polysaccharide recovered after extraction of Champia novae-zealandiae is a galactan with alternating 3-linked d-galactopyranosyl units sulfated at the 2-position, and 4-linked galactopyranosyl units sulfated at both the 2- and 3-positions that are predominantly of the l- and partly of the d-configuration. Other minor substitution includes 6-O-methyl ether or 4,6-pyruvate acetal on the 3-linked residues. Techniques used in determining the structure include infrared and 13C-NMR spectroscopy, and GC-MS analysis of alditol acetate derivatives produced by reductive hydrolysis/acetylation of native, methylated, and/or desulfated samples. These results are of particular interest because 4-linked 2,3-desulfated galactosyl residues have not been encountered as major constituents of red algal polysaccharides. |
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Keywords: | Champia Champiaceae polysaccharide structure red seaweed Rhodymeniales |
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