Document Detail

Structural elucidation of a new arabinogalactan from the leaves of Nerium indicum.
MedLine Citation:
PMID:  11403084     Owner:  NLM     Status:  MEDLINE    
A polysaccharide fraction, NIB-2, was obtained from the 3% aqueous sodium carbonate extract of Nerium indicum leaves using anion-exchange chromatography and gel-permeation chromatography. It was found to be composed of rhamnose, arabinose, galactose, in the ratios of 1.0:10.4:4.4, along with 4% of galacturonic acid. The results of methylation analysis, periodate oxidation, partial acid hydrolysis, pectinase treatment, and 13C and 1H NMR spectroscopy indicate that it is mainly an arabinogalactan having a backbone of 1,6-linked beta-Galp, with branches at O-3, consisting of terminal, 1,5-, and 1,3,5-linked arabinofuranosyl residues, and a small proportion of galactosyl residues at the termini. Rhamnose and galacturonic acid arose from a contaminating rhamnogalacturonan.
Q Dong; J N Fang
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Carbohydrate research     Volume:  332     ISSN:  0008-6215     ISO Abbreviation:  Carbohydr. Res.     Publication Date:  2001 May 
Date Detail:
Created Date:  2001-06-13     Completed Date:  2001-12-04     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0043535     Medline TA:  Carbohydr Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  109-14     Citation Subset:  IM    
Shanghai Institute of Materia Medica, Chinese Academy of Sciences, People's Republic of China.
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MeSH Terms
Angiosperms / chemistry*
Galactans / chemistry*
Nuclear Magnetic Resonance, Biomolecular
Plant Leaves / chemistry*
Plants, Toxic / chemistry*
Reg. No./Substance:
0/Galactans; 9036-66-2/arabinogalactan

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