6.3.3.1	phosphoribosylformylglycinamidine cyclo-ligase	-	
6.3.3.2	5-formyltetrahydrofolate cyclo-ligase	-	
6.3.3.3	dethiobiotin synthase	-	
6.3.3.4	(carboxyethyl)arginine beta-lactam-synthase	-	
6.3.3.5	O-ureido-D-serine cyclo-ligase	-	
6.3.3.6	carbapenam-3-carboxylate synthase	-	
6.3.3.7	Ni-sirohydrochlorin a,c-diamide reductive cyclase	-