Cell CycleMyoblastsMyoblasts, SkeletalCell Cycle ProteinsCell Cycle CheckpointsG1 PhaseMuscle DevelopmentCell DifferentiationCell DivisionMitosisCell LineS PhaseMusclesMyoD ProteinCyclinsMyoblasts, CardiacMuscle, SkeletalCells, CulturedMyogeninCell ProliferationMenstrual CycleG2 PhaseApoptosisCell FusionCyclin-Dependent Kinase Inhibitor p21Retinoblastoma ProteinCyclin-Dependent Kinase Inhibitor p27G2 Phase Cell Cycle CheckpointsMuscle Fibers, SkeletalPhosphorylationMolecular Sequence DataG0 PhaseDNA-Binding ProteinsProtein-Serine-Threonine KinasesSignal TransductionRNA, MessengerTranscription FactorsCDC2 Protein KinaseCell Line, TumorGene Expression RegulationCyclin D1Cyclin-Dependent Kinase 2G1 Phase Cell Cycle CheckpointsTumor Suppressor Protein p53Nuclear ProteinsDNA ReplicationCell NucleusFlow CytometryMutationCyclin ETime FactorsTransfectionCyclin-Dependent Kinase 4Base SequenceGenes, cdcTranscription, GeneticDNA DamageCyclin AInterphaseMuscle ProteinsCyclin BBromodeoxyuridineTumor Suppressor ProteinsDNACDC2-CDC28 KinasesModels, BiologicalCell SurvivalBlotting, WesternAmino Acid SequenceHeLa CellsSatellite Cells, Skeletal MuscleE2F Transcription FactorsTumor Cells, CulturedEstrous Cyclecdc25 PhosphatasesDown-RegulationFibroblastsGene Expression Regulation, DevelopmentalProtein BindingGene ExpressionCyclin B1Saccharomyces cerevisiaePromoter Regions, GeneticProtein KinasesRegenerationRNA, Small InterferingCyclin DCitric Acid CycleRNA InterferenceE2F1 Transcription FactorCyclin D3Enzyme InhibitorsReverse Transcriptase Polymerase Chain ReactionSaccharomyces cerevisiae ProteinsMicroscopy, FluorescenceProto-Oncogene ProteinsImmunohistochemistryChick EmbryoCarrier ProteinsMyogenic Regulatory Factors