ExocytosisPC12 CellsSecretory VesiclesChromaffin CellsCytoplasmic GranulesSynaptotagminsSNARE ProteinsCalciumSynaptic VesiclesElectric CapacitanceVesicular Transport ProteinsSynaptosomal-Associated Protein 25Weibel-Palade Bodiesrab3A GTP-Binding ProteinR-SNARE ProteinsQa-SNARE ProteinsMembrane FusionSyntaxin 1rab3 GTP-Binding ProteinsAcrosomeSynaptotagmin ICell MembraneMunc18 ProteinsPyridinium CompoundsNerve Tissue ProteinsVesicle-Associated Membrane Protein 2Endocytosisrab GTP-Binding ProteinsTetanus ToxinMembrane ProteinsAdrenal MedullaCells, CulturedAcrosome ReactionChromaffin GranulesSpider VenomsTransport VesiclesIslets of LangerhansBotulinum ToxinsQc-SNARE ProteinsQb-SNARE ProteinsN-Ethylmaleimide-Sensitive ProteinsSynaptotagmin IICalcium-Binding ProteinsCatecholaminesPresynaptic TerminalsParameciumCalcium SignalingNeurotransmitter AgentsKineticsQuaternary Ammonium CompoundsIonophoresGoldfishCytoplasmic VesiclesCell Membrane PermeabilityVesicle-Associated Membrane Protein 3CattlePatch-Clamp TechniquesMicroscopy, FluorescenceInsulinSoluble N-Ethylmaleimide-Sensitive Factor Attachment ProteinsChromaffin SystemProtein TransportStreptolysinsGuanosine 5'-O-(3-Thiotriphosphate)Microscopy, ConfocalGTP-Binding ProteinsCalcium ChannelsMast CellsEgtazic AcidNeuronsProprotein Convertase 2Membrane PotentialsLysosomesFluorescent DyesCalcimycinMicroscopy, ElectronOvumSpermatozoaMolecular Sequence DataAdenosine TriphosphateGreen Fluorescent ProteinsParamecium tetraureliaModels, BiologicalCarrier ProteinsNeuroendocrine CellsRecombinant Fusion ProteinsProtein Kinase CAmino Acid SequenceSynaptic MembranesInsulin-Secreting CellsCell LineActinsIonomycinTime FactorsSea UrchinsSynaptic TransmissionNeuronal Calcium-Sensor ProteinsProtein BindingMembrane GlycoproteinsSynapses