Binding, CompetitiveRadioligand AssayProtein BindingBinding SitesMolecular Sequence DataKineticsAmino Acid SequenceIodine RadioisotopesRecombinant ProteinsTetralonesLigandsBase SequenceCell LineProtein Structure, TertiaryCHO CellsElapid VenomsSurface Plasmon ResonanceCell MembraneIodocyanopindololCricetinaeModels, MolecularSequence Homology, Amino AcidProtein ConformationRecombinant Fusion ProteinsEscherichia coliPeptidesReceptors, Cell SurfaceMutagenesis, Site-DirectedCarrier ProteinsDose-Response Relationship, DrugReceptors, Adrenergic, alpha-1IsradipinePeptide FragmentsCloning, MolecularTritiumElectrophoresis, Polyacrylamide GelStructure-Activity RelationshipAdrenergic alpha-1 Receptor AntagonistsMacromolecular SubstancesCells, CulturedTransfectionDNADNA-Binding ProteinsGuanosine 5'-O-(3-Thiotriphosphate)Allosteric RegulationCalciumMolecular WeightCircular DichroismPindololReceptors, EndothelinRabbitsCattleCOS CellsAutoradiographyAffinity LabelsBacterial ProteinsDimerizationPeptides, CyclicSubstrate SpecificityReceptor, Endothelin BPrecipitin TestsSpectrometry, FluorescenceCross-Linking ReagentsAdrenergic alpha-AntagonistsMembranesThermodynamicsTranscription FactorsReceptors, MuscarinicCricetulusPrazosinMathematicsAntibodies, MonoclonalRNA, MessengerMutationDNA, ComplementaryTumor Cells, CulturedFluorescence PolarizationMembrane ProteinsScorpion VenomsPlasmidsReceptors, NicotinicSequence AlignmentGuanylyl ImidodiphosphateTwo-Hybrid System TechniquesEndothelinsReceptors, Adrenergic, betaCalorimetryReceptor, Endothelin AAllosteric SiteAmino Acid MotifsReceptors, NeurotransmitterPiperidinesBrainProtein Structure, SecondaryReceptors, ImmunologicCyclic AMPReceptors, Adrenergic, alphaHeLa Cellssrc Homology DomainsHydrolysis