Cell DifferentiationMuscle DevelopmentMusclesMyoD ProteinMuscle, SkeletalMyogeninCell ProliferationMyoblastsCells, CulturedMuscle ProteinsMuscle Fibers, SkeletalGene Expression Regulation, DevelopmentalMyoblasts, SkeletalMuscle, SmoothCell LineSignal TransductionMyogenic Regulatory FactorsTranscription FactorsRNA, MessengerGene Expression RegulationStem CellsMuscle, Smooth, VascularCell DivisionMEF2 Transcription FactorsMolecular Sequence DataDNA-Binding ProteinsMyogenic Regulatory Factor 5Muscle CellsBase SequenceMyocytes, Smooth MuscleImmunohistochemistryCell LineageMice, Inbred C57BLReverse Transcriptase Polymerase Chain ReactionTransfectionEmbryonic Stem CellsGene ExpressionPhenotypeMice, KnockoutMuscle ContractionTranscription, GeneticTime FactorsCell CycleNuclear ProteinsMice, TransgenicTrans-ActivatorsSex DifferentiationHomeodomain ProteinsBlotting, WesternApoptosisMesodermIn Situ HybridizationPromoter Regions, GeneticChick EmbryoDown-RegulationRegenerationUp-RegulationSerum Response FactorTretinoinActinsRepressor ProteinsMyosin Heavy ChainsPhosphorylationAmino Acid SequenceModels, BiologicalMuscle Fibers, Fast-TwitchSatellite Cells, Skeletal MuscleMutationGene Expression ProfilingCell MovementCell SurvivalEmbryo, MammalianTransforming Growth Factor betaRNA, Small InterferingProtein BindingMuscle Fibers, Slow-TwitchEmbryo, NonmammalianOsteoblastsTumor Cells, CulturedDesminCell Line, TumorOsteogenesisFlow CytometryRNA InterferenceDNA PrimersReceptors, NotchAntigens, DifferentiationFibroblastsMesenchymal Stromal CellsCarrier ProteinsFluorescent Antibody TechniqueBasic Helix-Loop-Helix Transcription FactorsGene Knockdown TechniquesCell NucleusCell Culture TechniquesMorphogenesisProto-Oncogene ProteinsDNASomitesMuscle Denervation