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A further amendment to the classical core structure of gum arabic (Acacia senegal)

Nie, S.P., Wang, C., Cui, S.W., Wang, Q., Xie, M.Y., Phillips, G.O. (2013). A further amendment to the classical core structure of gum arabic (Acacia senegal), 31(1), 42-48. http://dx.doi.org/10.1016/j.foodhyd.2012.09.014

Abstract

Using the more recently available techniques such as methylation-GC-MS, 1D (1H, 13C) and 2D (COSY, TOCSY, HMQC and HMBC) NMR spectral analysis, we have revisited the classical structure of gum arabic (Acacia senegal). Methylation and GC-MS analysis confirmed that gum arabic (A. senegal) is a highly branched polysaccharide with the backbone composed of 1,3-linked galactopyransyl (Galp) residues substituted at O-2, O-6 or O-4 positions. The terminal sugar residues are 59.5% of the total sugars. The residues of →2,3,6-β-d-Galp1→, →3,4-Galp1→, →3,4,6-Galp1→ and substitutions at O-2 and O-4 position were not identified in previous studies. © 2012.

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