Fig. 3From: Mechanism of microbial production of acetoin and 2,3-butanediol optical isomers and substrate specificity of butanediol dehydrogenaseSynthesis pathways of different optical isomers AC and BD. The dotted line represents non-enzymatic oxidation. ALDC, α-acetolactate decarboxylase; DAR, Diacetyl reductase; m-BDH, meso-BDHBack to article page