An unusual (4-O-methyl-d-glucurono)-d-xylan isolated from the mucilage of seeds of the quince tree (Cydonia oblonga)
✍ Scribed by Bengt Lindberg; Mohammed Mosihuzzaman; Nilufar Nahar; Rukmal M. Abeysekera; Robert G. Brown; J.H.Martin Willison
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 269 KB
- Volume
- 207
- Category
- Article
- ISSN
- 0008-6215
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✦ Synopsis
The major water-soluble polysaccharide in the mucilage of the seeds of the quince tree, Cydonia oblonga, is a partially 0-acetylated ( 4-O-methyl-D-glucurono)-D-xylan having an exceptionally high proportion of glycuronic acid residues. The 4-O-methyl-a-D-glucopyranosyluronic and a-D-glUCOpyranOSy~UrOniC acid groups are linked to positions 2 of a (1 +4)-p-D-xylan that is somewhat branced through the 2-positions. The 0-acetyl groups are linked to the /3-D-xylopyranosyl residues. The molar proportions of D-Xyl, 4-O-Me-D-GlcA, D-GlcA, and O-AC are -2:0.8:0.2:1.