1.7.1.1	nitrate reductase (NADH)	-	
1.7.1.10	hydroxylamine reductase (NADH)	-	
1.7.1.11	4-(dimethylamino)phenylazoxybenzene reductase	-	
1.7.1.12	N-hydroxy-2-acetamidofluorene reductase	-	
1.7.1.13	preQ1 synthase	-	
1.7.1.14	nitric oxide reductase [NAD(P)+, nitrous oxide-forming]	-	
1.7.1.15	nitrite reductase (NADH)	-	
1.7.1.16	nitrobenzene nitroreductase	-	
1.7.1.17	FMN-dependent NADH-azoreductase	-	
1.7.1.2	Nitrate reductase [NAD(P)H]	-	
1.7.1.3	nitrate reductase (NADPH)	-	
1.7.1.4	nitrite reductase [NAD(P)H]	-	
1.7.1.5	hyponitrite reductase	-	
1.7.1.6	azobenzene reductase	-	
1.7.1.7	GMP reductase	-	
1.7.1.8	Recommended Name never specified	deleted	
1.7.1.9	nitroquinoline-N-oxide reductase	-	
1.7.1.B1	xenobiotic reductase B	preliminary BRENDA-supplied EC number	
1.7.1.B2	aromatic nitroreductase [NAD(P)H]	preliminary BRENDA-supplied EC number	
1.7.1.B3	aromatic nitroreductase [NADPH]	preliminary BRENDA-supplied EC number	
1.7.1.B4	azobenzene reductase [NADH]	preliminary BRENDA-supplied EC number	
1.7.2.1	nitrite reductase (NO-forming)	-	
1.7.2.2	nitrite reductase (cytochrome; ammonia-forming)	-	
1.7.2.3	trimethylamine-N-oxide reductase	-	
1.7.2.4	nitrous-oxide reductase	-	
1.7.2.5	nitric oxide reductase (cytochrome c)	-	
1.7.2.6	hydroxylamine dehydrogenase	-	
1.7.2.7	hydrazine synthase	-	
1.7.2.8	hydrazine dehydrogenase	-	
1.7.2.9	hydroxylamine oxidase	-	
1.7.3.1	nitroalkane oxidase	-	
1.7.3.2	acetylindoxyl oxidase	-	
1.7.3.3	factor-independent urate hydroxylase	-	
1.7.3.4	hydroxylamine oxidase	transferred to EC 1.7.2.6 and EC 1.7.3.6	
1.7.3.5	3-aci-nitropropanoate oxidase	-	
1.7.3.6	hydroxylamine oxidase (cytochrome)	-	
1.7.5.1	nitrate reductase (quinone)	-	
1.7.5.2	nitric oxide reductase (menaquinol)	-	
1.7.6.1	nitrite dismutase	-	
1.7.7.1	ferredoxin-nitrite reductase	-	
1.7.7.2	ferredoxin-nitrate reductase	-	
1.7.99.1	hydroxylamine reductase	-	
1.7.99.2	nitric-oxide reductase	deleted	
1.7.99.3	nitrite reductase	deleted, now included with EC 1.7.2.1	
1.7.99.4	nitrate reductase	transferred to EC 1.7.1.1, nitrate reductase (NADH), EC 1.7.1.2, nitrate reductase [NAD(P)H], EC 1.7.1.3, nitrate reductase (NADPH), EC 1.7.5.1, nitrate reductase (quinone), EC 1.7.7.2, nitrate reductase (ferredoxin), EC 1.9.6.1, nitrate reductase (cytochrome)	
1.7.99.5	5,10-methylenetetrahydrofolate reductase (FADH2)	deleted, now included with EC 1.5.1.20, methylenetetrahydrofolate reductase [NAD(P)H]. Based on the reference, it had been thought that this was a separate enzyme from EC 1.5.1.20 but the reference upon which the entry was based has since been disproved	
1.7.99.6	nitrous-oxide reductase	transferred to EC 1.7.2.4	
1.7.99.7	nitric-oxide reductase	transferred to EC 1.7.2.5	
1.7.99.8	hydrazine oxidoreductase	transferred to EC 1.7.2.8