Structural features of an arabinogalactan gum exudates from Spondias dulsis (Anacardiaceae).
Carbohydr Res
; 338(7): 619-24, 2003 Mar 28.
Article
en En
| MEDLINE
| ID: mdl-12644375
The tree Spondias dulcis, located in Venezuela, exudes a light-brown gum. The polysaccharide, isolated from the original gum, contains galactose, arabinose, mannose, rhamnose, glucuronic acid, and its 4-O-methyl derivative. Application of chemical methods, in combination with 1D and 2D NMR spectroscopy afforded interesting structural features of the gum polysaccharide. The unequivocal presence of rhamnose in the polymer structure was confirmed by chemical and spectral data [1H (1.03 ppm); 13C (16.92 ppm)]. Also confirmed was the existence of 3-O- and 6-O-substitutes galactose residues by the spectral data correlations observed in Heteronuclear Multiple Quantum Coherence (HMQC) and Heteronuclear Multiple Bond Correlation (HMBC). Also observed were unequivocal resonances for beta-D-glucuronic acid and its 4-O-methyl derivative, and the presence of 3-O-alpha-L-arabinofuranose and 3-O-beta-L-arabinopyranose residues.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Polisacáridos
/
Anacardiaceae
/
Galactanos
Idioma:
En
Revista:
Carbohydr Res
Año:
2003
Tipo del documento:
Article
País de afiliación:
Venezuela
Pais de publicación:
Países Bajos