Structural studies on a polysaccharide fraction from the fruits of cordia dichotoma forst

✍ Scribed by Nanda G. Basu; Pradyot K. Ghosal; Swapnadip Thakur

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 579 KB
• Volume: 131
• Category: Article
• ISSN: 0008-6215
• DOI: 10.1016/0008-6215(84)85412-9

✦ Synopsis

The neutral polysaccharide isolated from the fruits of Cord& dichotoma was separated into two fractions, I and II, by gel filtration using Sephadex G-100. The major fraction, II, was found to contain D-glucose and L-arabinose in the molar ratio of 21:4. The results of complete hydrolysis with acid, permethylation studies, periodate oxidation, and Smith degradation suggested it to be an arabinoglucan, and the backbone of the polysaccharide to be composed of (l-+6)-linked D-glucopyranosyl and (1+2)-linked L-arabinofuranosyl residues. The average degree of polymerization, determined through end-group analysis, was found to be -144. N. G. BASU, P. K. GHOSAL, S. THAKUR TABLE I CONTENTS OF MONOSACCHARIDES IN THE POLYSACCHARIDE Monosaccharide Percent Fragments obtained in g.l.c.-m.s. analysis W4 D-Glucose L-Arabinose 86.1 43(100%),73(S), 85(8), 97(7), 103(15), 115(28), 128(15), 139(14), 145(21), 157(14), 170(11), 187(13), 217(11), 259(3), 289(6), 361(l) 13.2 43(100%), 73(4), 85(10), 103(13), 115(28), 127(13), 145(17), 157(6), 158(5), 187(11), 200(4), 217(9)