Receptors, NicotinicAmino AcidsSequence Homology, Amino AcidAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularPiperidinesDose-Response Relationship, DrugExcitatory Amino Acid AntagonistsAmino Acids, EssentialRats, Sprague-DawleyDopamine AntagonistsNeurokinin-1 Receptor AntagonistsMuscarinic AntagonistsAmino Acid Transport SystemsPurinergic P1 Receptor AntagonistsNarcotic AntagonistsRadioligand AssayBinding SitesBinding, CompetitivePeptide FragmentsKineticsAdrenergic alpha-1 Receptor AntagonistsStructure-Activity RelationshipSequence AlignmentBase SequenceMolecular Sequence DataNicotinic AntagonistsHormone AntagonistsAmino Acid MotifsRecombinant ProteinsAdenosine A2 Receptor AntagonistsPurinergic P2 Receptor AntagonistsMutationEscherichia coliRats, WistarModels, MolecularCell LinePeptidesMutagenesis, Site-DirectedProtein BindingProtein ConformationDNA, ComplementaryRNA, MessengerGuinea PigsPirenzepineReceptors, SerotoninNaltrexoneGABA AntagonistsAmino Acids, AromaticAdrenergic alpha-AntagonistsSequence Homology, Nucleic AcidHistamine H2 AntagonistsXanthinesReceptors, EndothelinCricetinaeAmino Acids, Branched-ChainCHO CellsGlycineOligopeptidesCells, CulturedLeucineInterleukin 1 Receptor Antagonist ProteinAmino Acids, SulfurPurinergic P2X Receptor AntagonistsReceptors, Purinergic P1Adenosine A3 Receptor AntagonistsProtein Structure, TertiaryHistamine AntagonistsBornanesPeptides, CyclicPyridinesRecombinant Fusion ProteinsReceptor, Endothelin ADNARabbitsGlutamic AcidSubstrate SpecificityIndolesReceptors, N-Methyl-D-AspartateReceptors, TachykininLigandsMolecular WeightAdenosineMuscle, SmoothHistamine H1 AntagonistsBacterial ProteinsAdrenergic beta-AntagonistsPyrazolesPropanolaminesReceptors, Opioid, deltaReceptors, MuscarinicDiaminesCalciumSpecies SpecificityDioxanesPurinergic P1 Receptor AgonistsReceptors, Neuropeptide YAdrenergic AntagonistsTachykinins