Cell CycleCell Cycle ProteinsApoptosisCell DeathCell Cycle CheckpointsCell Line, TumorSignal TransductionCell DivisionG1 PhaseCell LineTumor Suppressor Protein p53Cell ProliferationCell SurvivalCells, CulturedMitosisS PhasePhosphorylationMitochondriaCyclinsCaspasesModels, BiologicalDNA-Binding ProteinsHeLa CellsEnzyme ActivationMolecular Sequence DataMutationG2 PhaseMenstrual CycleTransfectionReactive Oxygen SpeciesPoly(ADP-ribose) PolymerasesCytochromes cBlotting, WesternApoptosis Regulatory ProteinsProtein BindingRNA, Small InterferingCyclin-Dependent Kinase Inhibitor p21bcl-2-Associated X ProteinCyclin-Dependent Kinase Inhibitor p27Proto-Oncogene ProteinsRetinoblastoma ProteinG2 Phase Cell Cycle CheckpointsProtein Structure, TertiaryCDC2 Protein KinaseG0 PhaseProtein-Serine-Threonine KinasesG1 Phase Cell Cycle CheckpointsCyclin-Dependent Kinase 2DNA DamageCyclin D1DNA ReplicationCyclin EGenes, cdcFlow CytometryCyclin ACyclin BInterphaseNuclear ProteinsCyclin-Dependent Kinase 4Tumor Suppressor ProteinsTime FactorsTranscription FactorsCell NucleusCDC2-CDC28 KinasesTumor Cells, CulturedRNA, Messengercdc25 PhosphatasesGene Expression RegulationEstrous CycleTranscription, GeneticAmino Acid SequenceSaccharomyces cerevisiaeE2F Transcription FactorsCell DifferentiationBase SequenceCyclin B1DNASaccharomyces cerevisiae ProteinsCyclin DCitric Acid CycleBromodeoxyuridineE2F1 Transcription FactorProtein KinasesDown-RegulationFibroblastsS Phase Cell Cycle CheckpointsFungal ProteinsAntineoplastic AgentsCyclin-Dependent Kinase Inhibitor ProteinsHistonesCyclin D3Enzyme InhibitorsSchizosaccharomycesGene Expression ProfilingRNA InterferenceCarrier ProteinsMicrotubule-Associated ProteinsGene Expression Regulation, NeoplasticPromoter Regions, GeneticM Phase Cell Cycle Checkpoints