Amino Acid SequenceAmino AcidsMolecular Sequence DataSequence Homology, Amino AcidBinding SitesMutagenesis, Site-DirectedCloning, MolecularBase SequenceAmino Acid SubstitutionModels, MolecularProtein ConformationStructure-Activity RelationshipKineticsSequence AlignmentProtein BindingProtein Structure, TertiaryMutationRecombinant ProteinsEscherichia coliPeptide FragmentsProtein Structure, SecondaryCell LineSubstrate SpecificityDNA, ComplementaryPeptidesRecombinant Fusion ProteinsLigandsBinding, CompetitiveAmino Acid MotifsCysteineSequence Homology, Nucleic AcidConserved SequenceBacterial ProteinsPoint MutationAlanineDNARadioligand AssayMutagenesisMolecular WeightNicotinic AgonistsReceptors, NicotinicDopamine AgonistsRestriction MappingCattleTransfectionAspartic AcidElectrophoresis, Polyacrylamide GelCell MembraneCricetinaeLysinePlasmidsTrypsinChromatography, High Pressure LiquidBufoteninCOS CellsCyanogen BromideAmino Acids, EssentialGlycineDNA PrimersDose-Response Relationship, DrugGenes, BacterialCHO CellsArginineAmino Acid Transport SystemsProteinsCrystallography, X-RayRNA, MessengerTryptophanCatalysisXenopus laevisGABA AgonistsGuanylyl ImidodiphosphateCircular DichroismOligopeptidesLeucinePhenylalanineSpecies SpecificityCarrier ProteinsMembrane ProteinsHistidinePhylogenySequence Analysis, DNAAmino Acids, AromaticHydrogen-Ion ConcentrationSerineMacromolecular SubstancesGTP-Binding ProteinsSequence DeletionHydrolysisGlutamic AcidMolecular StructureAmino Acids, BasicTyrosineCells, CulturedAllosteric RegulationCatalytic DomainMagnetic Resonance SpectroscopySaccharomyces cerevisiae2,5-Dimethoxy-4-MethylamphetamineModels, Chemical