ExocytosisNeurotransmitter AgentsSynaptic VesiclesSecretory VesiclesNeurotransmitter Transport ProteinsSynaptotagminsCalciumChromaffin CellsSNARE ProteinsSynaptosomal-Associated Protein 25Synaptotagmin ISynaptic TransmissionVesicular Transport ProteinsCytoplasmic GranulesPlasma Membrane Neurotransmitter Transport ProteinsReceptors, NeurotransmitterPresynaptic TerminalsNerve Tissue ProteinsR-SNARE ProteinsElectric CapacitanceSyntaxin 1Qa-SNARE ProteinsGlutamic AcidNeuronsrab3A GTP-Binding ProteinPC12 Cellsrab3 GTP-Binding ProteinsMembrane FusionSynapsesgamma-Aminobutyric AcidWeibel-Palade BodiesPyridinium CompoundsCell MembraneMunc18 ProteinsVesicle-Associated Membrane Protein 2AcrosomeSynapsinsCells, CulturedSpider VenomsSerotoninPatch-Clamp TechniquesTetanus ToxinSynaptotagmin IIMembrane ProteinsNeuromuscular JunctionSynaptosomesDopamineEndocytosisBrainRats, Sprague-DawleyBotulinum ToxinsElectric StimulationCalcium ChannelsCatecholaminesCalcium SignalingHippocampusMembrane PotentialsAdrenal MedullaElectrophysiologyN-Ethylmaleimide-Sensitive ProteinsNorepinephrineSynaptic MembranesAcetylcholineCalcium-Binding ProteinsGABA Plasma Membrane Transport Proteinsrab GTP-Binding ProteinsExcitatory Postsynaptic PotentialsKineticsNeuropeptidesChromaffin GranulesCarrier ProteinsGoldfishNerve EndingsMolecular Sequence DataAcrosome ReactionDose-Response Relationship, DrugTransport VesiclesCalcium Channels, N-TypeVesicular Glutamate Transport ProteinsAmino Acid SequenceQuaternary Ammonium CompoundsTime FactorsIslets of LangerhansReceptors, GlutamateGTP-Binding ProteinsCholine O-AcetyltransferaseReceptors, GABARats, WistarAdenosine TriphosphateProtein TransportAction PotentialsIonophoresMicroscopy, ConfocalModels, BiologicalQc-SNARE ProteinsQb-SNARE ProteinsCattleSignal TransductionSoluble N-Ethylmaleimide-Sensitive Factor Attachment ProteinsFluorescent Dyes