1.4.3.23	7-chloro-L-tryptophan oxidase	-	
1.4.3.6	amine oxidase (copper-containing)	deleted, this was classified on the basis of cofactor content rather than reaction catalysed and is now known to contain two distinct enzyme activities. It has been replaced by two enzymes, EC 1.4.3.21 (primary-amine oxidase) and EC 1.4.3.22 (diamine oxidase)	
1.4.3.12	cyclohexylamine oxidase	-	
1.4.3.18	cytokinin oxidase	deleted, not approved, cf. EC 1.5.99.12	
1.4.3.3	D-amino-acid oxidase	-	
1.4.3.1	D-aspartate oxidase	-	
1.4.3.7	D-glutamate oxidase	-	
1.4.3.15	D-glutamate(D-aspartate) oxidase	-	
1.4.3.22	diamine oxidase	-	
1.4.3.8	ethanolamine oxidase	-	
1.4.3.B1	gamma-glutamylputrescine oxidase	preliminary BRENDA-supplied EC number	
1.4.3.19	glycine oxidase	-	
1.4.3.2	L-amino-acid oxidase	-	
1.4.3.25	L-arginine oxidase	-	
1.4.3.16	L-aspartate oxidase	-	
1.4.3.11	L-glutamate oxidase	-	
1.4.3.20	L-lysine 6-oxidase	-	
1.4.3.14	L-lysine oxidase	-	
1.4.3.4	monoamine oxidase	-	
1.4.3.26	pre-mycofactocin synthase	-	
1.4.3.21	primary-amine oxidase	-	
1.4.3.13	protein-lysine 6-oxidase	-	
1.4.3.24	pseudooxynicotine oxidase	-	
1.4.3.10	putrescine oxidase	-	
1.4.3.5	pyridoxal 5'-phosphate synthase	-	
1.4.3.17	tryptophan alpha,beta-oxidase	transferred to EC 1.3.3.10	
1.4.3.9	tyramine oxidase	deleted, included in EC 1.4.3.4