2.4.2.2	pyrimidine-nucleoside phosphorylase	pyrimidine deoxyribonucleosides degradation	-	
2.4.2.3	uridine phosphorylase	pyrimidine deoxyribonucleosides degradation	-	
2.4.2.4	thymidine phosphorylase	pyrimidine deoxyribonucleosides degradation	-	
3.5.4.5	cytidine deaminase	pyrimidine deoxyribonucleosides degradation	-