3.6.1.9	nucleotide diphosphatase	pyrimidine deoxyribonucleotides dephosphorylation	-	
3.6.1.12	dCTP diphosphatase	pyrimidine deoxyribonucleotides dephosphorylation	-	
3.6.1.23	dUTP diphosphatase	pyrimidine deoxyribonucleotides dephosphorylation	-	
3.6.1.65	(d)CTP diphosphatase	pyrimidine deoxyribonucleotides dephosphorylation	-