2.It is like cytidine, but with one oxygen atom removed.
详细说明: Deoxycytidine is a compound and a nucleoside.
3.Uridine-cytidine kinase (UCK) (EC 2.7.1.48) is a pyrimidine ribonucleoside kinase that catalyzes the phosphorylation of uridine and cytidine to UMP and CMP.