Muscle, SmoothCell DifferentiationMyocytes, Smooth MuscleMuscle, Smooth, VascularSerum Response FactorLeiomyosarcomaMuscle ProteinsMuscle DevelopmentMusclesActinsMyoD ProteinCells, CulturedMuscle, SkeletalUrinary BladderGene Expression Regulation, DevelopmentalMyogeninEndometrial Stromal TumorsMyosin Heavy ChainsSerum Response ElementMyoblastsNeural CrestMesodermNuclear ProteinsMuscle ContractionSignal TransductionMuscle Fibers, SkeletalTranscription FactorsTrans-ActivatorsPericardiumAortaMicrofilament ProteinsGene Expression RegulationMyoblasts, SkeletalMyogenic Regulatory FactorsImmunohistochemistryPhenotypeTransforming Growth Factor betaMEF2 Transcription FactorsCell LinePromoter Regions, GeneticMuscle CellsRNA, MessengerMyogenic Regulatory Factor 5Cell DivisionMolecular Sequence DataCalciumDNA-Binding ProteinsBase SequenceTracheaDesminCell ProliferationMuscle RelaxationTime FactorsStem CellsMuscle Fibers, Fast-TwitchTransfectionGene ExpressionTranscription, GeneticSmooth Muscle MyosinsRabbitsRats, Sprague-DawleyChick EmbryoPhosphorylationMice, KnockoutReverse Transcriptase Polymerase Chain ReactionMice, Inbred C57BLMuscle Fibers, Slow-TwitchBlotting, WesternCell LineageSatellite Cells, Skeletal MuscleIn Situ HybridizationAmino Acid SequenceRegenerationMuscle DenervationUp-RegulationMuscle FatigueMyosinsModels, BiologicalMice, TransgenicGuinea PigsEnzyme InhibitorsMitochondria, MuscleEmbryonic Stem CellsSomitesAorta, ThoracicHomeodomain ProteinsCell MovementProtein BindingDown-RegulationEmbryo, NonmammalianDose-Response Relationship, DrugRepressor ProteinsSmooth Muscle TumorFluorescent Antibody TechniqueIsometric ContractionMuscle, StriatedPlatelet-Derived Growth FactorChickensDNAMutation