AdenosineProtein ConformationReceptor, Adenosine A2AReceptor, Adenosine A1Models, MolecularAdenosine A2 Receptor AntagonistsAdenosine DeaminasePurinergic P1 Receptor AntagonistsAdenosine A1 Receptor AntagonistsInterleukin 1 Receptor Antagonist ProteinReceptor, Adenosine A3Protein BindingBinding SitesReceptor, Adenosine A2BKineticsNeurokinin-1 Receptor AntagonistsReceptors, Adenosine A2Adenosine KinaseReceptors, Purinergic P1Protein Structure, TertiaryAdenosine A2 Receptor AgonistsMolecular Sequence DataCrystallography, X-RayProtein Structure, SecondaryAmino Acid SequenceDose-Response Relationship, DrugSpectrometry, FluorescenceXanthinesCircular DichroismAdenosine A1 Receptor AgonistsMolecular ConformationRats, Sprague-DawleyLigandsPiperidinesPurinergic P1 Receptor AgonistsHistamine H2 AntagonistsSerotonin 5-HT3 Receptor AntagonistsAdenosine MonophosphateExcitatory Amino Acid AntagonistsStructure-Activity RelationshipThermodynamicsAdenosine A3 Receptor AntagonistsDopamine AntagonistsAngiotensin Receptor AntagonistsHydrogen-Ion ConcentrationSerotonin 5-HT2 Receptor AntagonistsHormone AntagonistsPurinergic P2 Receptor AntagonistsRats, WistarCalciumMagnetic Resonance SpectroscopyRecombinant ProteinsAdenosine-5'-(N-ethylcarboxamide)MutationAdenosine TriphosphateEscherichia coliAdenosine TriphosphatasesTheophyllineNucleic Acid ConformationProtein FoldingNarcotic AntagonistsMutagenesis, Site-DirectedHistamine H1 AntagonistsModels, ChemicalPeptide FragmentsAllosteric RegulationReceptors, EndothelinBinding, CompetitiveReceptors, PurinergicMuscarinic AntagonistsTime FactorsTemperatureProtein Structure, QuaternaryMolecular Dynamics SimulationCyclic AMPDimerizationRabbitsGABA-A Receptor AntagonistsPhenethylaminesGABA AntagonistsHistamine AntagonistsProtein DenaturationSerotonin AntagonistsTryptophanHydrolysisNuclear Magnetic Resonance, BiomolecularMagnesiumReceptors, N-Methyl-D-AspartateGuinea PigsSialoglycoproteinsLeukotriene AntagonistsCells, CulturedReceptors, SerotoninHydrogen BondingReceptor, Endothelin ACell LineRadioligand AssayPeptidesCatalytic DomainDizocilpine Maleate