Receptors, NicotinicLigandsAmino AcidsSequence Homology, Amino AcidAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularBinding SitesMolecular Sequence DataAmino Acids, EssentialProtein BindingModels, MolecularBase SequenceAmino Acid Transport SystemsKineticsSequence AlignmentMutationStructure-Activity RelationshipAmino Acid MotifsPeptide FragmentsRecombinant ProteinsProtein ConformationMutagenesis, Site-DirectedEscherichia coliCell LineHormone AntagonistsProtein Structure, TertiaryDose-Response Relationship, DrugPeptidesExcitatory Amino Acid AntagonistsDNA, ComplementaryDopamine AntagonistsCD40 LigandRNA, MessengerNeurokinin-1 Receptor AntagonistsNarcotic AntagonistsSequence Homology, Nucleic AcidAmino Acids, AromaticBinding, CompetitiveRecombinant Fusion ProteinsHistamine H2 AntagonistsLeucineCells, CulturedRats, Sprague-DawleyAmino Acids, Branched-ChainDNAFas Ligand ProteinInterleukin 1 Receptor Antagonist ProteinSubstrate SpecificitySignal TransductionAmino Acids, SulfurProteinsMuscarinic AntagonistsCarrier ProteinsBacterial ProteinsMolecular WeightPiperidinesProtein Structure, SecondaryGABA AntagonistsTransfectionAlanineCricetinaeHistamine H1 AntagonistsMembrane ProteinsPurinergic P1 Receptor AntagonistsOligopeptidesGlycineDNA PrimersRestriction MappingElectrophoresis, Polyacrylamide GelPhylogenyCattleNicotinic AntagonistsCHO CellsSpecies SpecificityRadioligand AssayHistamine AntagonistsChromatography, High Pressure LiquidSequence Analysis, DNAAdenosine A2 Receptor AntagonistsPlasmidsConserved SequencePurinergic P2 Receptor AntagonistsGenes, BacterialMolecular StructureAdrenergic alpha-1 Receptor AntagonistsRats, WistarRabbitsGene ExpressionLysineTime FactorsMembrane GlycoproteinsCell MembraneBiological TransportValineIsoleucineGlutamic AcidArginineAmino Acid Transport Systems, BasicSerotonin 5-HT3 Receptor Antagonists