1.1.1.1	alcohol dehydrogenase	pyruvate fermentation to isobutanol (engineered)	-	-	
1.1.1.86	ketol-acid reductoisomerase (NADP+)	pyruvate fermentation to isobutanol (engineered)	-	-	
2.2.1.6	acetolactate synthase	pyruvate fermentation to isobutanol (engineered)	-	-	
4.1.1.72	branched-chain-2-oxoacid decarboxylase	pyruvate fermentation to isobutanol (engineered)	-	-	
4.2.1.9	dihydroxy-acid dehydratase	pyruvate fermentation to isobutanol (engineered)	-	-