Satellite Cells, Skeletal MusclePAX7 Transcription FactorMuscle, SkeletalMuscle DevelopmentMyoD ProteinCell DifferentiationRegenerationMuscle Fibers, SkeletalCardiotoxinsMusclesSatellite Cells, PerineuronalCells, CulturedMyoblastsCell LineageDNA, SatelliteMyogenic Regulatory Factor 5Muscle ProteinsMyogeninRNA, SatelliteMyoblasts, SkeletalMice, Inbred mdxMuscle ContractionCell ProliferationStem CellsMuscle Fibers, Fast-TwitchPaired Box Transcription FactorsDesminSignal TransductionRNA, MessengerMice, Inbred C57BLMuscle Fibers, Slow-TwitchMuscular AtrophyGene Expression RegulationMitochondria, MuscleSatellite CommunicationsMyostatinMuscle, SmoothMuscular DiseasesCell DivisionMuscle DenervationSatellite VirusesMuscle CellsMyogenic Regulatory FactorsImmunohistochemistryMuscle, Smooth, VascularMyosin Heavy ChainsMice, TransgenicAgingTranscription FactorsCell SeparationExercise