Cell DifferentiationMuscle DevelopmentMusclesMyoD ProteinMuscle, SkeletalMyogeninMyoblastsMuscle ProteinsMuscle Fibers, SkeletalMuscle, SmoothMyoblasts, SkeletalMyogenic Regulatory FactorsGene Expression Regulation, DevelopmentalTranscription FactorsCells, CulturedMEF2 Transcription FactorsMuscle, Smooth, VascularCell LineMyogenic Regulatory Factor 5Muscle CellsSignal TransductionMolecular Sequence DataGene Expression RegulationMuscle ContractionDNA-Binding ProteinsRNA, MessengerMyocytes, Smooth MuscleBase SequenceTranscription, GeneticMuscle Fibers, Fast-TwitchStem CellsSerum Response FactorPromoter Regions, GeneticNuclear ProteinsMyosin Heavy ChainsTrans-ActivatorsTransfectionPhenotypeCell DivisionRepressor ProteinsMuscle Fibers, Slow-TwitchActinsAmino Acid SequenceTime FactorsMesodermChick EmbryoCell ProliferationSatellite Cells, Skeletal MuscleMice, KnockoutImmunohistochemistryCell LineageReverse Transcriptase Polymerase Chain ReactionGene ExpressionMice, Inbred C57BLMutationProtein BindingRegenerationMuscle FatigueHomeodomain ProteinsMuscle DenervationIn Situ HybridizationDesminEmbryo, NonmammalianModels, BiologicalEmbryonic Stem CellsSomitesBlotting, WesternMice, TransgenicPhosphorylationDown-RegulationUp-RegulationMitochondria, MuscleCarrier ProteinsPaired Box Transcription FactorsGene Expression ProfilingRNA InterferenceLeiomyosarcomaCell FusionSex DifferentiationNeck MusclesTranscriptional ActivationDNA PrimersCell NucleusOculomotor MusclesCell CycleMuscle, StriatedExtremitiesHelix-Loop-Helix MotifsReceptors, NotchGene Knockdown TechniquesBinding SitesCreatine Kinase, MM FormTransforming Growth Factor betaLIM Domain ProteinsEmbryo, MammalianRNA, Small InterferingMuscle SpindlesMembrane ProteinsHistone DeacetylasesMuscle Relaxation