Naturally occurring polysaccharides from higher plants and seaweeds have been in use for a long time. Microbial polysaccharides however have only been discovered relatively recently. Xanthan gum was the second microbial polysaccharide to be commercialized. As a result, more gums were discovered and patented. Xanthan gum is a bacterial polysaccharide produced industrially on a large scale.
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