Fumarases (Fums) catalyze the reversible reaction converting fumarate to l-malate. There are two kinds of Fums: Class І and ІІ. Thermostable Class ІІ Fums, from mesophilic microorganisms, are utilized
All of 2, 3-butanediol used in this table is meso-2, 3-butanediol. KODDH: Diol dehydratase from K. oxytoca; LBDDH: Diol dehydratase from L. brevis; SEDDH: Diol dehydratase from S. enterica; KPGDH: Gly