Cell DifferentiationMuscle DevelopmentMusclesMyoD ProteinMuscle, SkeletalMyogeninMyoblastsMuscle ProteinsMuscle Fibers, SkeletalMuscle, SmoothMyoblasts, SkeletalMyogenic Regulatory FactorsGene Expression Regulation, DevelopmentalMEF2 Transcription FactorsMuscle, Smooth, VascularCells, CulturedMyogenic Regulatory Factor 5Cell LineMuscle CellsTranscription FactorsMuscle ContractionMyocytes, Smooth MuscleGene Expression RegulationSignal TransductionRNA, MessengerMolecular Sequence DataDNA-Binding ProteinsMuscle Fibers, Fast-TwitchSerum Response FactorStem CellsMyosin Heavy ChainsBase SequenceMuscle Fibers, Slow-TwitchSatellite Cells, Skeletal MuscleChick EmbryoMesodermActinsCell DivisionTransfectionTranscription, GeneticNuclear ProteinsMuscle FatigueMuscle DenervationCell LineageDesminRegenerationPhenotypeTrans-ActivatorsImmunohistochemistryCell ProliferationPromoter Regions, GeneticGene ExpressionSomitesTime FactorsIn Situ HybridizationMice, Inbred C57BLEmbryonic Stem CellsEmbryo, NonmammalianReverse Transcriptase Polymerase Chain ReactionHomeodomain ProteinsMice, KnockoutMitochondria, MuscleRepressor ProteinsAmino Acid SequenceLeiomyosarcomaOculomotor MusclesPaired Box Transcription FactorsMice, TransgenicNeck MusclesCell FusionSex DifferentiationBlotting, WesternModels, BiologicalMuscle, StriatedProtein BindingUp-RegulationExtremitiesMuscle SpindlesCreatine Kinase, MM FormDown-RegulationMutationMuscle RelaxationHelix-Loop-Helix MotifsCarrier ProteinsRespiratory MusclesLIM Domain ProteinsMuscle WeaknessReceptors, NotchQuailPapillary MusclesTransforming Growth Factor betaPhosphorylationHistone DeacetylasesPAX7 Transcription FactorCell NucleusTranscriptional ActivationMuscular Dystrophy, AnimalMyostatinEmbryo, MammalianCreatine Kinase