Cell CycleCell AgingCell Cycle ProteinsCell Cycle CheckpointsG1 PhaseCyclin-Dependent Kinase Inhibitor p21Tumor Suppressor Protein p53Cell DivisionMitosisCyclinsCyclin-Dependent Kinase Inhibitor p16S PhaseCell ProliferationRetinoblastoma ProteinApoptosisDNA DamageFibroblastsG2 PhaseCell Line, TumorMenstrual CycleCyclin-Dependent Kinase Inhibitor p27G2 Phase Cell Cycle CheckpointsCells, CulturedCell LineSignal TransductionTelomereProtein-Serine-Threonine KinasesTumor Suppressor ProteinsDNA-Binding ProteinsAgingPhosphorylationNuclear ProteinsG0 PhaseCyclin-Dependent Kinase 2G1 Phase Cell Cycle CheckpointsCDC2 Protein KinaseTelomerasePlant LeavesMutationMolecular Sequence DataCyclin D1DNA ReplicationCyclin ECyclin-Dependent Kinase 4Transcription FactorsFlow CytometryGene Expression RegulationDrug LabelingModels, BiologicalTime FactorsCyclin ACell NucleusCyclin Bbeta-GalactosidaseRNA, MessengerInterphaseDown-RegulationBlotting, WesternCDC2-CDC28 KinasesTumor Cells, CulturedE2F Transcription FactorsHeLa CellsAging, PrematureRNA, Small InterferingCell DifferentiationTranscription, GeneticCell SurvivalEstrous CyclePhenotypeBase SequenceRNA Interferencecdc25 PhosphatasesDNACell Transformation, NeoplasticSaccharomyces cerevisiaeAmino Acid SequenceGene Expression ProfilingCyclin B1HistonesBromodeoxyuridineE2F1 Transcription FactorDolichol PhosphatesTransfectionCyclin-Dependent Kinase 6Cyclin DProtein BindingSaccharomyces cerevisiae ProteinsReverse Transcriptase Polymerase Chain ReactionTumor Suppressor Protein p14ARFCitric Acid CycleS Phase Cell Cycle CheckpointsPromoter Regions, GeneticUp-RegulationProtein KinasesAntineoplastic AgentsGene Expression Regulation, PlantNeoplasmsRepressor ProteinsGene ExpressionProto-Oncogene Proteins c-myc