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The structure of gum arabic (Acacia seyal) has been studied using methylation analysis and 2D (COSY, TOCSY, HMQC and HMBC) NMR spectroscopy. Galacturonic acid (13.66%) is a major component not previously identified. The backbone is made up of 1,3-linked galactopyranosyl (Galp) residues substituted at O-2, O-6 or O-4 positions, which are terminated with mainly arabinofuranosyl (Araf), galacturonopyranosyl...
Using the more recently available techniques such as methylation–GC–MS, 1D ( 1 H, 13 C) 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...
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