Receptors, NicotinicAmino AcidsSequence Homology, Amino AcidStructure-Activity RelationshipAmino Acid SequencePurinergic P2 Receptor AntagonistsDose-Response Relationship, DrugBinding, CompetitiveNicotinic AntagonistsAmino Acid SubstitutionConotoxinsMolecular Sequence DataRadioligand AssayKineticsCloning, MolecularBinding SitesProtein BindingRecombinant ProteinsCell LineModels, MolecularPeptide FragmentsPeptidesViper VenomsPiperidinesCHO CellsInhibitory Concentration 50CricetinaeStereoisomerismBicyclo Compounds, HeterocyclicMolecular StructureAmino Acids, EssentialGuinea PigsOligopeptidesReceptors, SerotoninLigandsPeptides, CyclicRats, Sprague-DawleyAmino Acid Transport SystemsIndolesSulfonamidesSerotonin AntagonistsSequence AlignmentCells, CulturedSignal TransductionBase SequenceHormone AntagonistsAmino Acid MotifsCalciumMutationExcitatory Amino Acid AntagonistsEscherichia coliMutagenesis, Site-DirectedDopamine AntagonistsNeurokinin-1 Receptor AntagonistsDNA, ComplementaryNarcotic AntagonistsMuscle ContractionProtein ConformationAmino Acids, AromaticSequence Homology, Nucleic AcidHistamine H2 AntagonistsAmino Acids, Branched-ChainLeucineInterleukin 1 Receptor Antagonist ProteinAmino Acids, SulfurProtein Structure, TertiaryCyclic AMPRNA, MessengerMuscarinic AntagonistsDNASubstrate SpecificityGABA AntagonistsMolecular WeightHistamine H1 AntagonistsBacterial ProteinsPurinergic P1 Receptor AntagonistsRecombinant Fusion ProteinsAlanineRestriction MappingProteinsGlycineHistamine AntagonistsPhylogenySequence Analysis, DNAAdenosine A2 Receptor AntagonistsCarrier ProteinsSpecies SpecificityElectrophoresis, Polyacrylamide GelProtein Structure, SecondaryAdrenergic alpha-1 Receptor AntagonistsGenes, BacterialChromatography, High Pressure LiquidDNA PrimersPlasmidsCattleConserved SequenceAmino Acid Transport Systems, BasicRats, WistarValineLysine