PurinesPurine NucleotidesPurine NucleosidesHypoxanthinesBase PairingAdenineHypoxanthineBase SequencePurine-Nucleoside PhosphorylasePhosphoribosyl PyrophosphatePentosyltransferasesGuanineInosinePyrimidine NucleotidesRibosemonophosphatesNucleobase Transport ProteinsGuanosineNucleosidesPyrimidine NucleosidesDNANucleic Acid ConformationHypoxanthine PhosphoribosyltransferaseDeoxyadenosinesNucleotidesSkull BaseBase CompositionKineticsSchiff BasesMolecular Sequence DataPyrimidinesSubstrate SpecificityOligonucleotidesMutationEscherichia coliModels, MolecularStructure-Activity RelationshipBinding SitesThermodynamicsBiological Transport, ActiveSkull Base NeoplasmsBase Pair MismatchInosine MonophosphateDenture BasesAmidophosphoribosyltransferasePurine-Pyrimidine Metabolism, Inborn ErrorsMethylthioinosineAdenosineAmino Acid SequenceOligodeoxyribonucleotidesPhosphoribosylglycinamide FormyltransferaseXanthine2-AminopurineAdenine PhosphoribosyltransferaseCloning, MolecularHydroxymethyl and Formyl TransferasesAdenosine DeaminaseHydrogen BondingAdenylosuccinate LyaseThymineRibonucleotidesPhosphoribosylaminoimidazolecarboxamide FormyltransferaseDNA GlycosylasesUracilRibose-Phosphate PyrophosphokinaseRibonucleosidesN-Glycosyl HydrolasesLesch-Nyhan SyndromeGuanosine MonophosphateXanthinesDNA RepairInosine NucleotidesRNADeoxyribonucleosidesDeoxyguanosineAzaserineAllantoinAdenylosuccinate SynthaseKnowledge BasesTranscription, GeneticMannich BasesAzaguanineMolecular StructureAdenine NucleotidesUric AcidFormycinsAdenosine MonophosphatePentosephosphatesPlasmidsAdenosine TriphosphateCarbon-Nitrogen Ligases with Glutamine as Amide-N-DonorNucleoside Transport ProteinsXanthine DehydrogenaseGenesHydrogen-Ion ConcentrationPromoter Regions, GeneticNucleotidasesRNA, MessengerThionucleosidesAdenosine Deaminase InhibitorsAdenosine Kinase