Myocytes, CardiacSubstrate SpecificityMyocardiumKineticsCells, CulturedHeartAnimals, NewbornMolecular Sequence DataCardiomegalyMyocardial ContractionAmino Acid SequenceRats, Sprague-DawleyRats, WistarCalciumHeart VentriclesBinding SitesPhosphorylationCatalysisTime FactorsHydrogen-Ion ConcentrationMitochondria, HeartSignal TransductionProtein BindingEnzyme ActivationModels, MolecularCell LineRecombinant ProteinsHydrolysisEscherichia coliBase SequenceRabbitsAdenosine TriphosphateCardiotonic AgentsIsoproterenolCell SizeSarcomeresMyocardial Reperfusion InjuryCell DifferentiationApoptosisEnzyme InhibitorsEmbryonic Stem CellsMolecular WeightElectrophoresis, Polyacrylamide GelOxidation-ReductionDose-Response Relationship, DrugMutationCalcium Channels, L-TypeGATA4 Transcription FactorCatalytic DomainBlotting, WesternMice, TransgenicRNA, MessengerProtein Structure, TertiaryProtein ConformationSarcolemmaCalcium SignalingHypertrophyMuscle CellsConnexin 43Muscle ProteinsCattleMice, Inbred C57BLStructure-Activity RelationshipIsoenzymesCrystallography, X-RayMicroscopy, ConfocalAction PotentialsModels, BiologicalCell SurvivalChromatography, High Pressure LiquidSarcoplasmic Reticulum Calcium-Transporting ATPasesSequence Homology, Amino AcidAdrenergic beta-AgonistsGene ExpressionGlucoseCell MembraneCardiomyopathiesSarcoplasmic ReticulumMutagenesis, Site-DirectedMyocardial IschemiaSodium-Calcium ExchangerGuinea PigsTemperatureCardiac MyosinsPeptidesPatch-Clamp TechniquesMyoblasts, CardiacCarrier ProteinsMice, KnockoutCytosolReactive Oxygen SpeciesCloning, MolecularMolecular StructureGene Expression RegulationDisease Models, AnimalTransfectionVentricular RemodelingL-Lactate DehydrogenaseStereoisomerismBiological Transport