Reverse Transcriptase InhibitorsHIV Reverse TranscriptaseNucleosidesHIV Protease InhibitorsProtease InhibitorsAnti-HIV AgentsDrug Resistance, ViralHIV-1BenzoxazinesHIV InfectionsNevirapineZidovudineHIV ProteaseDelavirdineOrganophosphonatesRitonavirRNA-Directed DNA PolymeraseDideoxynucleosidesDrug Resistance, Multiple, ViralStavudinePyrimidinonesAdeninePurine NucleosidesLopinavirAntiretroviral Therapy, Highly ActiveOxazinesSerine Proteinase InhibitorsDidanosineNelfinavirPyrimidine NucleosidesLamivudineNucleoside Transport ProteinsZalcitabineMolecular Sequence DataSaquinavirIndinavirViral LoadDideoxynucleotidesPyridazinesMutationPyranocoumarinsAnti-Retroviral AgentsCD4 Lymphocyte CountDrug Therapy, CombinationHIVRNA, ViralAntiviral AgentsAmino Acid SequenceSerine EndopeptidasesVirus ReplicationEquilibrative Nucleoside Transporter 1Peptide HydrolasesBase SequenceTreatment FailureSecretory Leukocyte Peptidase InhibitorEndopeptidasesKineticsCell LineDrug InteractionsCarbamatesHIV-Associated Lipodystrophy SyndromeThymine NucleotidesReverse Transcriptase Polymerase Chain ReactionHIV Integrase InhibitorsProteinase Inhibitory Proteins, SecretoryTrypsin InhibitorsSerpinsCysteine ProteasesRibonuclease HGenotypepol Gene Products, Human Immunodeficiency VirusMutation, MissenseCysteine EndopeptidasesThioinosineModels, MolecularPurine-Nucleoside PhosphorylaseTelomeraseAcidosis, LacticAmino Acid SubstitutionHIV-2PyridinesCysteine Proteinase InhibitorsSubstrate SpecificityAcquired Immunodeficiency SyndromeFuransOligopeptidesDrug Resistance, MicrobialInhibitory Concentration 50PyrrolidinonesProtease NexinsStructure-Activity RelationshipDeoxyadenosinesCells, CulturedReverse TranscriptionGuanosineMolecular StructureIntegrase InhibitorsRecombinant ProteinsChromatography, High Pressure LiquidUridine