Receptors, NicotinicPiperidinesAmino AcidsSequence Homology, Amino AcidAmino Acid SequenceCloning, MolecularAmino Acid SubstitutionMolecular Sequence DataBase SequenceBinding SitesMutationEscherichia coliSequence AlignmentKineticsAmino Acids, EssentialAmino Acid Transport SystemsProtein BindingRecombinant ProteinsPeptide FragmentsProtein ConformationProtein SubunitsMutagenesis, Site-DirectedModels, MolecularMacromolecular SubstancesAmino Acid MotifsStructure-Activity RelationshipCell LineProtein Structure, TertiaryDNA, ComplementaryHormone AntagonistsMolecular WeightExcitatory Amino Acid AntagonistsRNA, MessengerSequence Homology, Nucleic AcidDose-Response Relationship, DrugPeptidesDopamine AntagonistsElectrophoresis, Polyacrylamide GelDNARecombinant Fusion ProteinsNeurokinin-1 Receptor AntagonistsSubstrate SpecificityNarcotic AntagonistsRats, Sprague-DawleyAmino Acids, AromaticBacterial ProteinsLeucineHistamine H2 AntagonistsAmino Acids, Branched-ChainRestriction MappingInterleukin 1 Receptor Antagonist ProteinAmino Acids, SulfurCattleCells, CulturedProtein Structure, SecondaryMuscarinic AntagonistsDNA PrimersProteinsPlasmidsCarrier ProteinsPhylogenyGABA AntagonistsTransfectionSaccharomyces cerevisiaeAlanineGlycineGenes, BacterialSpecies SpecificitySequence Analysis, DNARabbitsBinding, CompetitiveConserved SequenceHistamine H1 AntagonistsChromatography, High Pressure LiquidTranscription, GeneticPurinergic P1 Receptor AntagonistsNicotinic AntagonistsCricetinaeTrypsinGene ExpressionMembrane ProteinsSignal TransductionProtein BiosynthesisLysineCell MembraneHistamine AntagonistsPolymerase Chain ReactionBiological TransportOligopeptidesRats, WistarMutagenesisGlutamic AcidAdenosine A2 Receptor AntagonistsPurinergic P2 Receptor AntagonistsPhosphorylationTime FactorsPoint MutationAdrenergic alpha-1 Receptor AntagonistsGenesArginine