Satellite Cells, Skeletal MusclePAX7 Transcription FactorMuscle, SkeletalMuscle DevelopmentRegenerationMuscle Fibers, SkeletalMyoD ProteinMusclesCell DifferentiationCells, CulturedCell LineageMyoblastsSatellite Cells, PerineuronalMuscle ProteinsMyogenic Regulatory Factor 5DNA, SatelliteMuscle ContractionMyogeninMice, Inbred mdxMuscle Fibers, Fast-TwitchMitochondria, MuscleMuscle Fibers, Slow-TwitchMyoblasts, SkeletalMuscle, SmoothCell ProliferationDesminPaired Box Transcription FactorsMuscular AtrophyStem CellsRNA, MessengerMice, Inbred C57BLMuscle DenervationMuscle, Smooth, VascularMuscular DiseasesRNA, SatelliteSignal TransductionMuscle FatigueExerciseGene Expression RegulationGlycogenMuscle CellsMyostatinQuadriceps MuscleAging