Pyrimidine NucleotidesRibonucleotidesRibonucleotide ReductasesPyrimidinesPyrimidine DimersRibonucleoside Diphosphate ReductasePyrimidine NucleosidesPhosphoribosylglycinamide FormyltransferaseCytidine DiphosphateHydroxymethyl and Formyl TransferasesHydroxyureaDeoxyribonucleotidesEscherichia coliKineticsMolecular Sequence DataPurinesBase SequenceThiosemicarbazonesPurine NucleotidesDNAUltraviolet RaysDeoxyribonuclease (Pyrimidine Dimer)Orotic AcidPyrimidine PhosphorylasesUridineUracilDeoxyribonucleosidesMutationDNA ReplicationPhosphoribosylaminoimidazolecarboxamide FormyltransferaseNucleotidesCytidineProtein BiosynthesisCytosine NucleotidesFree RadicalsMolecular StructureAmino Acid SequenceOrotate PhosphoribosyltransferaseDeoxycytosine NucleotidesThymine NucleotidesDeoxyadenine NucleotidesCell LineRNA, MessengerDihydroorotaseSubstrate SpecificityNucleotide DeaminasesNucleosidesDeoxyribodipyrimidine Photo-LyaseElectron Spin Resonance SpectroscopyDNA RepairDeoxyadenosinesRNAThymidineDeoxyguanine Nucleotides