the hco-3 is reacted with phosphoenolpyruvate ( pep ) in the presence of pep carboxylase ( ec 4.1.1.31 ) and the oxaloacetate formed reduced to malate by nadh in the reaction catalyzed by malate dehydrogenase ( ec 1.1.1.37 ) .
C0024544
malate dehydrogenase
C0030016
ec 1