Satellite Cells, Skeletal MusclePAX7 Transcription FactorMuscle, SkeletalMuscle DevelopmentRegenerationMuscle Fibers, SkeletalMyoD ProteinCell DifferentiationMusclesCells, CulturedCell LineageMyoblastsSatellite Cells, PerineuronalMuscle ProteinsMyogenic Regulatory Factor 5DNA, SatelliteMuscle ContractionMyogeninMice, Inbred mdxMuscle Fibers, Fast-TwitchCell ProliferationMitochondria, MuscleStem CellsMyoblasts, SkeletalMuscle Fibers, Slow-TwitchMuscle, SmoothDesminPaired Box Transcription FactorsRNA, MessengerSignal TransductionMice, Inbred C57BLMuscular AtrophyGene Expression RegulationMuscle, Smooth, VascularMuscle DenervationMuscular DiseasesCell DivisionRNA, SatelliteMuscle FatigueExerciseMuscle CellsGlycogenMyostatinImmunohistochemistryQuadriceps MuscleAgingCell SeparationMyosin Heavy Chains