An Acidic Xylan from the Capsular Polysaccharide complex of Ocimum Gratissimum Seeds

Anjaneyalu, Y. V. and Ujeebur Rahman khan, M. and Tharanathan, R. N. (1983) An Acidic Xylan from the Capsular Polysaccharide complex of Ocimum Gratissimum Seeds. Carbohydrate Research, 116. pp. 83-88.

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Abstract

An acidic xylan composed of D-xylose (48%). L-arabinose (16%). D-galactose (16%), and D-galacturonic acid (-20%) has been isolated from the capsular, mucilaginous polysaccharide-complex of the seeds of Ocimum gratissimum. Graded, acid hydrolysis afforded O-P-D-galactopyranosyl-(I-3)-L-arabinose, an aldobiouronic acid, and an aldotriouronic acid composed of D-XylOSe and D-gakturonic acid. Methylation analysis, together with the isolation of a xylan core from the acid-degraded polysaccharide. indicated that the polysaccharide contains a (l-4)-linked xylan backbone with 60% of the xylosyl residues substituted either on O-2 or O-3 with O-~-D-galactopyranosyl-(I-+3)-L-arabinofuranosyl. Larabinofuranosyl, or D-galactopyranosyluronic acid side-chains. These structural features for the polysaccharide accord with periodate-oxidation studies.

Item Type:	Article
Uncontrolled Keywords:	Ocimum species, polysaccharide-complex, acidic xylan
Subjects:	500 Natural Sciences and Mathematics > 10 Plants 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 28 Polysaccharide Chemistry
Divisions:	Dept. of Biochemistry
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	08 Jun 2011 09:47
Last Modified:	02 Apr 2018 11:00
URI:	http://ir.cftri.res.in/id/eprint/10087

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