6.3.4.4	adenylosuccinate synthase	-	
6.3.4.5	argininosuccinate synthase	-	
6.3.4.6	urea carboxylase	-	
6.3.4.7	ribose-5-phosphate-ammonia ligase	-	
6.3.4.8	imidazoleacetate-phosphoribosyldiphosphate ligase	-	
6.3.4.9	biotin-[methylmalonyl-CoA-carboxytransferase] ligase	-	
6.3.5.1	NAD+ synthase (glutamine-hydrolysing)	-	
6.3.5.10	adenosylcobyric acid synthase (glutamine-hydrolysing)	-	
6.3.5.11	cobyrinate a,c-diamide synthase	-	
6.3.5.12	Ni-sirohydrochlorin a,c-diamide synthase	-