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alpha-acetolactate decarboxylase Puruvate can be fermented to 2,3-butanediol. It is first converted to alpha-acetolactate by alpha-acetolactate synthase, then decarboxylated to acetoin by this enzyme. Acetoin can be reduced in some species to 2,3-butanediol by acetoin reductase. [Energy metabolism, Fermentation]
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