The mutan like polymer GtfML1 is formed using sucrose by the glucanotransferase GtfML1 of Lactobacillus reuteri strain ML1. The highly branched compound contains mainly α(1→3) and a minor amount of α(1→6) linkages. Glucans produced by glucanotransferase enzymes are potentially prebiotic, stimulating the gastrointestinal tract.

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