NucleosidesOrganophosphonatesReverse Transcriptase InhibitorsAdenineDrug Resistance, ViralAnti-HIV AgentsNucleotidesPurine NucleosidesAntiviral AgentsPyrimidine NucleosidesNucleoside Transport ProteinsHIV InfectionsHIV-1Equilibrative Nucleoside Transporter 1Molecular Sequence DataThioinosineAdenine NucleotidesPurine-Nucleoside PhosphorylaseGuanosineInosineUridineNucleoside-Diphosphate KinasePolymorphism, Single NucleotidePurine NucleotidesAmino Acid SequenceGuanine NucleotidesBase SequenceCytidineNucleoside QNucleoside-TriphosphataseCloning, MolecularAdenosineKineticsRibonucleosidesEquilibrative-Nucleoside Transporter 2Adenosine TriphosphateEscherichia coliFormycinsPentosyltransferasesDNAPyrimidine NucleotidesNM23 Nucleoside Diphosphate KinasesMutationNucleic Acid ConformationThymine NucleotidesNucleotides, CyclicDeoxyribonucleosidesDeoxyadenosinesEquilibrative Nucleoside Transport ProteinsRibonucleotidesSubstrate SpecificitySequence Analysis, DNAPurinesGuanosine TriphosphateGuanine Nucleotide Exchange FactorsBinding SitesSequence Homology, Nucleic AcidAdenosine DiphosphateDilazepTubercidinDeoxyguanine NucleotidesDideoxynucleosidesZidovudineCytosine NucleotidesTranscription, GeneticSequence Homology, Amino AcidRNAArabinonucleosidesRNA, ViralPhylogenyGuanineThymidineDeoxycytidine KinaseAdenosine MonophosphateModels, MolecularSequence AlignmentRNA, TransferOligonucleotidesDeoxyuridineGenes, BacterialHIV Reverse TranscriptaseDeoxyribonucleotidesRNA, MessengerPyrimidine PhosphorylasesGenesCell LineThionucleosidesPlasmidsCodonGenotypePyrophosphatasesUridine PhosphorylaseStructure-Activity RelationshipCytidine TriphosphateZalcitabineDNA PrimersAcid Anhydride HydrolasesDeoxyadenine NucleotidesBiological TransportHydrolysis