The dextran like polymer Gtf33 is formed using sucrose by the glucanotransferase Gtf33 of Lactobacillus parabuchneri strain 33. The branched compound contains a mainly α(1→6) and a minor amount of α(1→3) linkages. Glucans produced by glucanotransferase enzymes are potentially prebiotic, stimulating the gastrointestinal tract.

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