3.1.3.5	5'-nucleotidase	UTP and CTP dephosphorylation I	-	
3.1.3.91	7-methylguanosine nucleotidase	UTP and CTP dephosphorylation I	-	
3.6.1.6	nucleoside diphosphate phosphatase	UTP and CTP dephosphorylation I	-	
3.6.1.15	nucleoside-triphosphate phosphatase	UTP and CTP dephosphorylation I	-	
6.3.4.2	CTP synthase (glutamine hydrolysing)	UTP and CTP dephosphorylation I	-