5.3.3.1	steroid DELTA-isomerase	-	
5.3.3.10	5-carboxymethyl-2-hydroxymuconate DELTA-isomerase	-	
5.3.3.11	isopiperitenone DELTA-isomerase	-	
5.3.3.12	L-dopachrome isomerase	-	
5.3.3.13	polyenoic fatty acid isomerase	-	
5.3.3.14	trans-2-decenoyl-[acyl-carrier protein] isomerase	-	
5.3.3.15	ascopyrone tautomerase	transferred, now EC 5.3.2.7	
5.3.3.16	4-oxalomesaconate tautomerase	transferred, now EC 5.3.2.8	
5.3.3.17	trans-2,3-dihydro-3-hydroxyanthranilate isomerase	-	
5.3.3.18	2-(1,2-epoxy-1,2-dihydrophenyl)acetyl-CoA isomerase	-