Structural features of water-soluble novel polysaccharide components from the leaves of Tridax procumbens Linn.
✍ Scribed by T. Shantha Raju; E.A. Davidson
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 871 KB
- Volume
- 258
- Category
- Article
- ISSN
- 0008-6215
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✦ Synopsis
fUrstract Two water-soluble polysaccharide fractions, WSTP-IA and WSTP-IB were purified from the leaves of Triaim procumbens Linn. with graded ethanol precipitation followed by mild delignification and size-exclusion chromatography. WSTP-IA contained L-Ara f and E&alp in -1: 3 molar proportions, and WSTP-IB contained only o-Galp as the major sugar component. The results of methylation linkage analysis, and iH and 13C NMR studies on the native and modified polysaccharides, indicated that WSTP-IA is an L-urubino-o-galactan with a p-(1 + 6)-o-galactan main chain in which at least one in every two r&alp residues carries single residues of either L-Araf (U-/B-) or fi-r&alp end-group as substituents at O-3. WSTP-IB is a linear p-(1 + 6)-o-galactan. This is the first report of polysaccharides containing a B-0 -+ 6)-D-galactan main chain isolated from plant sources.