Igartuburu J, Pando E, Rodríguez-Luis F, Gil-Serrano A Structure of a hemicellulose A fraction in dietary fiber from the seed of grape variety Palomino (Vitis vinifera cv. Palomino) Journal of Natural Products61(7) (1998)
876-880
/Variants 0/-+
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-4)-b-D-Xylp-(1-
/Variants 0/ is:
?%b-D-GlcpA4Me-(1-2)-
OR (exclusively)
?%D-Xylp-(1-2)-
Taxonomic group: plant / Streptophyta (Phylum: Streptophyta) Organ / tissue:seed
The structure was elucidated in this paper NCBI PubMed ID:9677267 Publication DOI:10.1021/np9702401 Journal NLM ID:7906882 Publisher: American Society of Pharmacognosy Correspondence: Igartuburu J <josemanuel.igartuburuuca.es> Institutions: Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, Cádiz, Spain, Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, Sevilla, Spain
The structure of one of the hemicellulose A fractions (HA-l) extracted from the seeds of the grape variety Palomino (Vitis vinifera cv. Palomino) has been studied by means of methylation, 1H NMR, 13C NMR, and partial hydrolysis. This hemicellulose seems to be a homogeneous polysaccharide with an apparent molecular weight of 68 500. Its structure is that of an acidic xylan, a linear chain of β-D-xylopyranosyl units, bonded together by (1→4) glycosidic links, containing single α-D-xylopyranosyl and 4-O-methyl-α-D- glucopyranuronosyl residues joined by glycosidic links to position 2 of the xylose units of the main chain, in proportions of one residue to every 25 units of xylose.
polysaccharides, hydrolysis, Gas chromatography, dietary fiber, hemicellulose, Vitis vinifera, rosales
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