Publication: Structural characterization of mesquite (Prosopis velutina) gum and its fractions
Authors
López Franco, Yolanda L. ; Calderón de la Barca, Ana María ; Valdez, Miguel Ángel ; Peter, Martin G. ; Rinaudo, Marguerite ; Chambat, Gérard ; Goycoolea Valencia, Francisco Martín
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Facultades de la UMU::Facultad de Biología
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Publisher
Wiley
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DOI
https://doi.org/10.1002/mabi.200700285
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info:eu-repo/semantics/article
Description
Abstract
Structural and physicochemical characteristics of mesquite gum (from Prosopis velutina) were investigated using FT-IR spectroscopic, mass spectrometric and chromatographic methods. Four fractions (F-I, F-IIa, F-IIb and F-III) were isolated by hydrophobic interaction chromatography. The samples were characterized and analyzed for their monosaccharide and oligomers composition by high performance anion-exchange chromatography with pulsed amperometric detection (HPAEC-PAD). L-Arabinose (L-Ara) and D-galactose (D-Gal) were found as the main carbohydrate constituent residues in the polysaccharides from mesquite gum and their ratio (L-Ara/D-Gal) varied within the range 2.54 to 3.06 among the various fractions. Small amounts of D-glucose (D-Glc), D-mannose (D-Man) and D-xylose (D-Xyl) were also detected, particularly in Fractions IIa, IIb and III. Infrared spectroscopy identified polysaccharides and protein in all the samples. Data from mass spectrometry (MALDI-TOF MS) was consistent with the idea that the structure corresponding to the periphereal chains of Fraction I is predominantly a chain of pentoses attached to uronic acid.
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Citation
López-Franco Y.L., Calderón de la Barca A.M., Valdez M.A., Peter M.G., Rinaudo M., Chambat G., *Goycoolea F.M. (2008). Structural characterization of mesquite (Prosopis velutina) gum and its fractions. Macromol Biosci. 8, 749-757.
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