NicotineNicotinic AgonistsTobacco Use DisorderGanglionic StimulantsReceptors, NicotinicMecamylamineCotinineNicotinic AntagonistsChewing GumModels, BiologicalSubstance Withdrawal SyndromeMolecular Sequence DataTobacco Use Cessation ProductsSmoking CessationProtein BindingSmokingAdministration, CutaneousDihydro-beta-ErythroidineAmino Acid SequenceBinding SitesTarsalpha7 Nicotinic Acetylcholine ReceptorDose-Response Relationship, DrugSelf AdministrationBase SequenceBiological ProductsCell LineAzocinesTime FactorsModels, MolecularRats, Sprague-DawleyBiological AssayProtein Structure, TertiaryBiological TherapyKineticsAconitineSignal TransductionConditioning, OperantBiological MarkersRecombinant ProteinsTobaccoQuinolizinesMutationDNA-Binding ProteinsTobacco ProductsTobacco, SmokelessBrainCells, CulturedRewardBicyclo Compounds, HeterocyclicBinding, CompetitiveTranscription FactorsDNABehavior, AnimalAnabasineCarbon MonoxideBiological WarfareRNA, MessengerProtein ConformationSequence Homology, Amino AcidMolecular StructureGene Expression RegulationReinforcement (Psychology)ProteinsRecombinant Fusion ProteinsLigandsBiological ProcessesDopamineAnalysis of VarianceGene Expression ProfilingCarrier ProteinsSelf StimulationAlgorithmsBungarotoxinsPromoter Regions, GeneticHexamethoniumComputational BiologyBenzazepinesEscherichia coliTransfectionPyridinesTobacco Smoke PollutionCloning, MolecularSequence AlignmentQuinoxalinesPeptidesCell Line, TumorHexamethonium CompoundsMotor ActivityChromatography, High Pressure LiquidNitrosaminesVentral Tegmental AreaSmokeAlkaloidsRats, WistarCattleBacterial ProteinsAntibodies, MonoclonalPest Control, BiologicalCell Membrane