Cell CycleCell Cycle ProteinsApoptosisCell Cycle CheckpointsCell DivisionG1 PhaseCell ProliferationCell Line, TumorMitosisS PhaseCyclinsSignal TransductionTumor Suppressor Protein p53G2 PhaseCyclin-Dependent Kinase Inhibitor p21CaspasesTumor Cells, CulturedCell LineCaspase 3Cell SurvivalApoptosis Regulatory ProteinsCells, CulturedPhosphorylationMenstrual CycleProto-Oncogene Proteins c-bcl-2Cyclin-Dependent Kinase Inhibitor p27Retinoblastoma ProteinFlow CytometryProtein-Serine-Threonine KinasesG2 Phase Cell Cycle CheckpointsInhibitor of Apoptosis ProteinsMolecular Sequence DataDNA DamageBlotting, WesternDNA-Binding ProteinsG0 PhaseRNA, MessengerG1 Phase Cell Cycle CheckpointsCDC2 Protein KinaseCyclin D1Tumor Suppressor ProteinsAntineoplastic AgentsTime FactorsNuclear ProteinsTransfectionMutationDNA FragmentationCyclin-Dependent Kinase 2Transcription FactorsHeLa CellsCell Nucleusbcl-2-Associated X ProteinDown-RegulationEnzyme ActivationDNA ReplicationGene Expression RegulationProto-Oncogene ProteinsCyclin ERNA, Small InterferingIn Situ Nick-End LabelingModels, BiologicalGene Expression Regulation, NeoplasticCyclin ACell DifferentiationGenes, cdcEnzyme InhibitorsCyclin BTranscription, GeneticInterphaseCyclin-Dependent Kinase 4Base SequenceAmino Acid SequenceDNADose-Response Relationship, DrugFibroblastsCDC2-CDC28 KinasesE2F Transcription FactorsProtein BindingReverse Transcriptase Polymerase Chain ReactionCell Growth ProcessesSaccharomyces cerevisiaeMitochondriaRNA InterferenceCarrier Proteinscdc25 PhosphatasesE2F1 Transcription FactorCyclin B1Gene ExpressionX-Linked Inhibitor of Apoptosis ProteinUp-RegulationEstrous CycleCaspase 9BromodeoxyuridineProtein KinasesCaspase InhibitorsCyclin DSaccharomyces cerevisiae ProteinsMicrotubule-Associated ProteinsImmunohistochemistryGene Expression Profiling