MyogeninMyoD ProteinMyogenic Regulatory FactorsPromoter Regions, GeneticMuscle, SkeletalCell DifferentiationMyogenic Regulatory Factor 5Base SequenceMuscle DevelopmentDNA-Binding ProteinsGene Expression RegulationMolecular Sequence DataTranscription, GeneticMuscle ProteinsMyoblastsCell LineRNA, MessengerMusclesTransfectionTranscriptional ActivationBinding SitesTranscription FactorsTrans-ActivatorsGenes, ReporterMEF2 Transcription FactorsHelix-Loop-Helix MotifsPlasmidsNuclear ProteinsDNAEnhancer Elements, GeneticTranscription Factor 7-Like 1 ProteinRegulatory Sequences, Nucleic AcidChloramphenicol O-AcetyltransferaseRhabdomyosarcoma, EmbryonalRepressor ProteinsSp1 Transcription FactorCloning, MolecularProtein BindingGene ExpressionDNA Methylation