AphidicolinDiterpenesDNA Polymerase IIDNA ReplicationDNA-Directed DNA PolymeraseChromosome Fragile SitesChromosome FragilityMimosinePhosphonoacetic AcidHydroxyureaDNA Polymerase IDeoxyribonucleotidesNucleic Acid Synthesis InhibitorsCell CycleS PhaseDesmosterolDeoxycytosine NucleotidesDNA Polymerase IIIDNAKineticsCell LineFormazansDeoxyguanine NucleotidesParvoviridaeCell NucleusDNA, ViralAntiviral AgentsSimian virus 40HeLa CellsDNA Damage