PyrimidinesPyrimidine NucleotidesPyrimidine NucleosidesUracilPyrimidine DimersThyminePurinesCytosineBase PairingCytidineDeoxyribonuclease (Pyrimidine Dimer)NucleosidesBase SequenceUridineDeoxyuridinePentosyltransferasesDNAOligonucleotidesUltraviolet RaysOligodeoxyribonucleotidesNucleic Acid ConformationThymidineDNA DamagePyrimidine PhosphorylasesMolecular Sequence DataKineticsOrotic AcidSubstrate SpecificityOrotate PhosphoribosyltransferaseModels, MolecularBinding SitesDeoxyribodipyrimidine Photo-LyaseDihydroorotasePurine NucleotidesAspartate CarbamoyltransferaseBase CompositionCarbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing)Orotidine-5'-Phosphate DecarboxylaseUridine PhosphorylaseDNA RepairSkull BaseDihydroorotate OxidaseUracil NucleotidesSchiff BasesUridine KinaseUridine MonophosphatePurine NucleosidesDeoxyribonucleosidesUridine TriphosphateEscherichia coliNucleotidesPurine-Pyrimidine Metabolism, Inborn ErrorsAdenineMutationRibonucleosidesN-Glycosyl HydrolasesThiamineCarbamyl PhosphateBase Pair MismatchEndodeoxyribonucleasesOxidoreductases Acting on CH-CH Group DonorsDNA GlycosylasesAzauridineCytosine NucleotidesMolecular StructureCytidine TriphosphateStructure-Activity RelationshipAmino Acid SequenceDihydrouracil Dehydrogenase (NADP)Phosphoribosyl PyrophosphateGuanosineNucleotidases5'-NucleotidaseRibonucleotidesSkull Base NeoplasmsHydrogen BondingXeroderma PigmentosumDeoxycytidine MonophosphateTranscription, GeneticRNAFloxuridinePhosphonoacetic AcidMagnetic Resonance SpectroscopyThymine NucleotidesCloning, MolecularBromouracilFolic Acid AntagonistsDeoxycytosine NucleotidesPhotochemistryDCMP DeaminaseDenture BasesDNA, BacterialPhosphotransferasesPlasmidsRadiation EffectsCell LineDeoxyribonucleotidesNucleoside Transport ProteinsCarbamoyl-Phosphate Synthase (Ammonia)Thymidine Monophosphate