ExocytosisCalcium SignalingCalcium ChannelsCalcium, DietarySecretory VesiclesCalcium CarbonateChromaffin CellsCytoplasmic GranulesSynaptotagminsCalcium PhosphatesSNARE ProteinsCalcium IsotopesElectric CapacitanceSynaptic VesiclesCalciumCalcium ChlorideCalcium Channels, L-TypeVesicular Transport ProteinsSynaptosomal-Associated Protein 25Weibel-Palade Bodiesrab3A GTP-Binding ProteinQa-SNARE ProteinsR-SNARE ProteinsEgtazic AcidAcrosomeCells, CulturedCalcium OxalateSyntaxin 1Membrane FusionPC12 CellsSynaptotagmin Irab3 GTP-Binding ProteinsCalcium RadioisotopesCalcium GluconateCalcimycinCalcium-Binding ProteinsCalcium Channels, N-TypePyridinium CompoundsKineticsCell MembraneMunc18 ProteinsMembrane PotentialsNerve Tissue ProteinsPatch-Clamp TechniquesIonophoresChelating AgentsCalcium CompoundsMembrane ProteinsVesicle-Associated Membrane Protein 2Spider VenomsEndocytosisCalcium Channel AgonistsAcrosome ReactionAdrenal MedullaFluorescent DyesCytosolTime FactorsPresynaptic TerminalsNeuronsTetanus Toxinrab GTP-Binding ProteinsAdenosine TriphosphateCell Membrane PermeabilityIonomycinNeurotransmitter AgentsChromaffin GranulesCattleNifedipineThapsigarginIslets of LangerhansElectrophysiologyFura-2Dose-Response Relationship, DrugMagnesiumMicroscopy, FluorescenceRats, Sprague-DawleyTransport VesiclesMicroscopy, ConfocalSynaptotagmin IICatecholaminesModels, BiologicalPotassiumCell LineIntracellular FluidCalcium HydroxideBotulinum ToxinsMolecular Sequence DataStrontiumPhosphorusQuaternary Ammonium CompoundsN-Ethylmaleimide-Sensitive ProteinsQb-SNARE ProteinsSignal TransductionCalcium SulfateQc-SNARE ProteinsCalcium Channels, P-TypeProtein Kinase CGoldfishAmino Acid SequenceParathyroid Hormone