previous studies of herpesvirus infections have indicated that a virus-specified thymidine kinase is required for the initial phosphorylation of acyclovir [ acycloguanosine or 9- ( 2-hydroxyethoxymethyl ) guanine ] in the formation of acycloguanosine triphosphate .
C0040078
thymidine kinase
C0031715
phosphorylation