PyrimidinesPyrimidine NucleotidesPyrimidine DimersPyrimidine NucleosidesEnzymesBiocatalysisSubstrate SpecificityKineticsCatalysisDeoxyribonuclease (Pyrimidine Dimer)Methylmalonate-Semialdehyde Dehydrogenase (Acylating)Pyrimidine PhosphorylasesDithioerythritolOrotic AcidMolecular Sequence DataModels, MolecularBiosynthetic PathwaysOrotate PhosphoribosyltransferaseUltraviolet RaysUracilPurinesDihydroorotaseDeoxyribodipyrimidine Photo-LyaseModels, ChemicalAcyltransferasesAmino Acid SequenceMolecular StructureS-AdenosylmethionineUridineAspartate CarbamoyltransferaseEscherichia coliPurine NucleotidesPyridoxal PhosphateCarbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing)Orotidine-5'-Phosphate DecarboxylaseOxidation-ReductionUridine PhosphorylaseCatalytic DomainCytidineBinding SitesDihydroorotate OxidaseOxidoreductasesBase SequenceUracil NucleotidesStructure-Activity RelationshipUridine KinaseHydrogen-Ion ConcentrationPentosyltransferasesCrystallography, X-RayThymineNucleosidesUridine MonophosphateDNA RepairPurine NucleosidesAcyl Coenzyme AUridine TriphosphateMutationProtein ConformationDeoxyribonucleosidesHydrolysisIron-Sulfur ProteinsDNAFree RadicalsSequence Homology, Amino AcidDeoxyuridineBacterial ProteinsProtein Structure, TertiarySpectrophotometryEnzyme InhibitorsCloning, MolecularPurine-Pyrimidine Metabolism, Inborn ErrorsAdenosine TriphosphateRibonucleosidesModels, BiologicalSequence AlignmentNucleotidesThiamineRecombinant ProteinsMagnesiumCarbamyl PhosphateProtein BindingNucleic Acid ConformationOxidoreductases Acting on CH-CH Group DonorsPhylogenyAzauridineDNA DamageBacteriaCytosineCytosine NucleotidesMolecular WeightN-Glycosyl HydrolasesEndodeoxyribonucleasesCytidine TriphosphateThymidineDihydrouracil Dehydrogenase (NADP)Enzyme ActivationAdenineNucleotidasesPhosphoribosyl Pyrophosphate5'-Nucleotidase