PurinesPyrimidinesPyrimidine NucleotidesPurine NucleotidesPyrimidine DimersPyrimidine NucleosidesPharmacologyPurine NucleosidesPharmacology, ClinicalPurine-Nucleoside PhosphorylaseDeoxyribonuclease (Pyrimidine Dimer)PentosyltransferasesPyrimidine PhosphorylasesOrotic AcidUracilHypoxanthineHypoxanthinesNucleosidesUltraviolet RaysOrotate PhosphoribosyltransferaseInosineAdenineUridineDihydroorotasePurine-Pyrimidine Metabolism, Inborn ErrorsDeoxyribodipyrimidine Photo-LyasePhosphoribosyl PyrophosphateUridine PhosphorylaseAspartate CarbamoyltransferaseCytidineOrotidine-5'-Phosphate DecarboxylaseCarbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing)GuanosineDeoxyribonucleosidesDNADihydroorotate OxidaseKineticsRibonucleosidesUracil NucleotidesUridine TriphosphateNucleotidesBase SequenceThymineUridine KinaseMolecular Sequence DataGuanineDNA RepairUridine MonophosphateRibonucleotidesAdenosineNucleic Acid ConformationInosine MonophosphateRibosemonophosphatesDeoxyuridineStructure-Activity RelationshipMolecular StructureNucleotidasesEscherichia coli5'-NucleotidaseMutationHypoxanthine PhosphoribosyltransferaseSubstrate SpecificityAmidophosphoribosyltransferaseAdenine PhosphoribosyltransferaseN-Glycosyl HydrolasesThiaminePhosphoribosylglycinamide FormyltransferaseNucleoside Transport ProteinsDeoxyadenosinesFormycinsCytosinePhosphoribosylaminoimidazolecarboxamide FormyltransferaseDose-Response Relationship, DrugNucleobase Transport ProteinsXanthinesModels, MolecularXanthineHydroxymethyl and Formyl TransferasesAdenosine DeaminaseCarbamyl PhosphateMethylthioinosineAdenosine TriphosphateBinding SitesDNA DamageAzauridineOligonucleotidesCytosine NucleotidesThymidineFolic Acid AntagonistsPentosephosphatesRibose-Phosphate PyrophosphokinasePyrimidinonesAmino Acid SequenceCell LineAzaserineDrug DesignCytidine TriphosphateLesch-Nyhan SyndromeOxidoreductases Acting on CH-CH Group DonorsOligodeoxyribonucleotides