1.18.1.1	rubredoxin-NAD+ reductase	-	
1.18.1.2	ferredoxin-NADP+ reductase	-	
1.18.1.3	ferredoxin-NAD+ reductase	-	
1.18.1.4	rubredoxin-NAD(P)+ reductase	-	
1.18.1.5	putidaredoxin-NAD+ reductase	-	
1.18.1.6	adrenodoxin-NADP+ reductase	-	
1.18.1.7	ferredoxin-NAD(P)+ reductase (naphthalene dioxygenase ferredoxin-specific)	-	
1.18.1.8	ferredoxin-NAD+ oxidoreductase (Na+-transporting)	transferred to EC 7.2.1.2	
1.18.3.1	hydrogenase	transferred to EC 1.18.99.1	
1.18.6.1	nitrogenase	-