Cell CycleCell Cycle ProteinsCell Cycle CheckpointsG1 PhaseCell LineMitosisS PhaseCell DivisionCyclinsMenstrual CycleG2 PhaseDNA ReplicationApoptosisMolecular Sequence DataCell ProliferationCyclin-Dependent Kinase Inhibitor p21Base SequenceCyclin-Dependent Kinase Inhibitor p27Cells, CulturedRetinoblastoma ProteinG2 Phase Cell Cycle CheckpointsL Cells (Cell Line)DNATumor Suppressor Protein p53Cell Line, TumorFibroblastsDNA DamageDNA-Binding ProteinsMutationTranscription, GeneticPhosphorylationG0 PhaseCDC2 Protein KinaseProtein-Serine-Threonine KinasesInterphaseCell NucleusG1 Phase Cell Cycle CheckpointsGene Expression RegulationHeLa CellsCell Transformation, NeoplasticRNA, MessengerCyclin-Dependent Kinase 2TransfectionNuclear ProteinsCyclin D1Flow CytometryCyclin ETumor Cells, CulturedGenes, cdcAmino Acid SequenceSignal TransductionCyclin ATranscription FactorsCyclin BCell Transformation, ViralTime FactorsCyclin-Dependent Kinase 4Cell SurvivalSimian virus 40Tumor Suppressor ProteinsCDC2-CDC28 KinasesEstrous Cyclecdc25 PhosphatasesModels, BiologicalCell DifferentiationBromodeoxyuridineCloning, MolecularSaccharomyces cerevisiaeE2F Transcription FactorsPolyomavirusKineticsBlotting, WesternCyclin B1Protein BindingHybrid Cells3T3 CellsPromoter Regions, GeneticPlasmidsGenesDNA RepairHistonesCyclin DCitric Acid CycleProtein KinasesHydroxyureaE2F1 Transcription FactorVirus ReplicationSaccharomyces cerevisiae ProteinsDown-RegulationS Phase Cell Cycle CheckpointsDNA, ViralSpecies SpecificityAntineoplastic AgentsRNA, Small InterferingGene ExpressionEmbryo, MammalianThymidine KinaseIdoxuridineProto-Oncogene ProteinsCyclin-Dependent Kinase Inhibitor p16