Molecular Structure of Xanthan Gum

Xanthan gum is a high molecular weight polysaccharide produced by viscous fermentation of Xanthomonas campestris. Its unique functionality compared to other commercial polysaccharides is provided by the actual structure of the xanthan gum molecule. The polymer backbone is made up of (1,4)-linked ß-D-glucose residues and, therefore, is identical to the cellulose molecule. A trisaccharide branch containing one glucuronic acid unit between two mannose units is linked to every other glucose unit at the number 3 position.

 

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