Sarcoplasmic ReticulumCalcium-Transporting ATPasesSarcoplasmic Reticulum Calcium-Transporting ATPasesCalciumEndoplasmic ReticulumRabbitsRyanodine Receptor Calcium Release ChannelCalsequestrinCaffeineRyanodineMusclesAdenosine TriphosphatasesMyocardiumCalcium-Binding ProteinsAdenosine TriphosphateSodium-Potassium-Exchanging ATPaseMyocardial ContractionCa(2+) Mg(2+)-ATPaseCalcium SignalingKineticsH(+)-K(+)-Exchanging ATPaseCalcium ChannelsRuthenium RedMuscle ProteinsMagnesiumMyocytes, CardiacMuscle, SkeletalSodium-Calcium ExchangerThapsigarginEgtazic AcidMicrosomesExcitation Contraction CouplingSarcolemmaMuscle ContractionCalcium Channels, L-TypeBiological Transport, ActiveTetracaineHeart VentriclesMyofibrilsMuscle Fibers, SkeletalProcaineOxalatesDogsDantroleneIntracellular MembranesHeartProton-Translocating ATPasesMicroscopy, ElectronMalignant HyperthermiaPhosphorylationMembrane PotentialsVanadiumVanadatesHydrogen-Ion ConcentrationAdenosine DiphosphateBinding SitesEndoplasmic Reticulum StressBiological TransportHydrolysisAmino Acid SequencePotassiumMolecular Sequence DataFluorescent DyesProtein BindingCell MembranePhosphatesFluorescein-5-isothiocyanateMembrane ProteinsMuscle Fibers, Fast-TwitchProtein ConformationIndolesMurexideCalcium RadioisotopesSpectrometry, FluorescenceIon TransportMembranesXanthenesNaphthalenesulfonatesTime FactorsSodiumEndoplasmic Reticulum, RoughPapillary MusclesLasalocidCytosolAction PotentialsHalothaneCells, CulturedOuabainIsoproterenolTerpenesEnzyme InhibitorsAequorinCalcium Channel BlockersStrontiumPotassium ChlorideAdenylyl ImidodiphosphateRana pipiensModels, BiologicalSaponinsVentricular Function