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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Miller, I.J., Falshaw, R. & Furneaux, R.H. A polysaccharide fraction from the red seaweed Champia novae-zealandiae Rhodymeniales, Rhodophyta. Hydrobiologia 326, 505–509 (1996). https://doi.org/10.1007/BF00047853
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DOI: https://doi.org/10.1007/BF00047853