it was found that there are two kinds of pyrimidine nucleoside , monophosphokinase deoxythymidine 5'-monophosphate-deoxyuridine 5'-monophosphate ( dtmp-dump ) kinase and cytidine 5'-monophosphate-deoxycytidine 5'-monophosphate-uridine 5'-monophosphate-doexyuridine 5'-monophosphate ( cmp-dcmp-ump-dump ) kinase , and their molecular weights were calculated to be 46,000 and 26,000 , respectively , by gel filtration .
C0034287
pyrimidine nucleoside
C0041984
uridine