R. Falshaw, R. H. Furneaux, I. J. Miller
The Backbone Structure of the Sulfated Galactan from Plocamium costatum (C. Agardh) Hook. f. et Harv. (Plocamiaceae, Rhodophyta)
The polysaccharide extracted from Plocamium costatum has been examined by chemical and spectroscopic techniques. Glycosyl linkage analysis of the native polysaccharide revealed a complex sulfated galactan, but the substitution and linkage pattern was not obvious, partly because the 4-linked units are nearly all 3-sulfated and a high proportion of the 3-linked units are 4-sulfated. Glycosyl linkage and 13C NMR spectroscopic analysis of a solvolytically desulfated sample, however, confirmed a backbone structure of alternating 3-linked ?-D-galactopyranosyl and 4-linked ?-galactopyranosyl units as expected for a red algal galactan. The 4-linked galactosyl units, however, are present in both the D- and L-configuration in approximately equal amounts.
Botanica Marina, Walter de Gruyter
Print ISSN: 0006-8055
Volume: 42, 09/1999
Pages: 431 - 435
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