4.3.1.1	aspartate ammonia-lyase	-	
4.3.1.10	serine-sulfate ammonia-lyase	-	
4.3.1.11	dihydroxyphenylalanine ammonia-lyase	deleted, no experimental evidence of the enzyme-catalysed reaction	
4.3.1.12	ornithine cyclodeaminase	-	
4.3.1.13	carbamoyl-serine ammonia-lyase	-	
4.3.1.14	3-Aminobutyryl-CoA ammonia-lyase	-	
4.3.1.15	Diaminopropionate ammonia-lyase	-	
4.3.1.16	threo-3-hydroxy-L-aspartate ammonia-lyase	-	
4.3.1.17	L-serine ammonia-lyase	-	
4.3.1.18	D-Serine ammonia-lyase	-	
4.3.1.19	threonine ammonia-lyase	-	
4.3.1.2	methylaspartate ammonia-lyase	-	
4.3.1.20	erythro-3-hydroxy-L-aspartate ammonia-lyase	-	
4.3.1.21	aminodeoxygluconate ammonia-lyase	deleted, identical to EC 4.3.1.9	
4.3.1.22	3,4-dihydroxyphenylalanine reductive deaminase	-	
4.3.1.23	tyrosine ammonia-lyase	-	
4.3.1.24	phenylalanine ammonia-lyase	-	
4.3.1.25	phenylalanine/tyrosine ammonia-lyase	-	
4.3.1.26	chromopyrrolate synthase	transferred. Now EC 1.21.3.9	
4.3.1.27	threo-3-hydroxy-D-aspartate ammonia-lyase	-	
4.3.1.28	L-lysine cyclodeaminase	-	
4.3.1.29	D-glucosaminate-6-phosphate ammonia-lyase	-	
4.3.1.3	histidine ammonia-lyase	-	
4.3.1.30	dTDP-4-amino-4,6-dideoxy-D-glucose ammonia-lyase	-	
4.3.1.31	L-tryptophan ammonia lyase	-	
4.3.1.32	7,8-didemethyl-8-hydroxy-5-deazariboflavin synthase	-	
4.3.1.4	formimidoyltetrahydrofolate cyclodeaminase	-	
4.3.1.5	phenylalanine ammonia-lyase	deleted. Now classified as EC 4.3.1.23 (tyrosine ammonia-lyase), EC 4.3.1.24 (phenylalanine ammonia-lyase) and EC 4.3.1.25 (phenylalanine/tyrosine ammonia-lyase)	
4.3.1.6	beta-alanyl-CoA ammonia-lyase	-	
4.3.1.7	ethanolamine ammonia-lyase	-	
4.3.1.8	hydroxymethylbilane synthase	transferred to EC 2.5.1.61	
4.3.1.9	glucosaminate ammonia-lyase	-	
4.3.1.B2	imidazole glycerol phosphate synthase	preliminary BRENDA-supplied EC number