Proliferating Cell Nuclear AntigenCell CycleApoptosisCell ProliferationCell Cycle ProteinsCell Cycle CheckpointsG2 PhaseDNA DamageCheckpoint Kinase 2Genes, cdcMitosisS PhaseProtein-Serine-Threonine KinasesAtaxia Telangiectasia Mutated ProteinsG1 PhaseG2 Phase Cell Cycle CheckpointsTumor Suppressor Protein p53Cell DivisionProtein KinasesDNA-Binding ProteinsTumor Suppressor ProteinsDNA RepairCyclinsCell Line, TumorPhosphorylationCyclin-Dependent Kinase Inhibitor p21Signal TransductionNuclear ProteinsDNA ReplicationM Phase Cell Cycle Checkpointscdc25 PhosphatasesGamma RaysCell LineCDC2 Protein KinaseCells, CulturedCyclin BRadiation, IonizingHydroxyureaAtaxia TelangiectasiaMutationCell SurvivalFlow CytometryG1 Phase Cell Cycle CheckpointsSpindle ApparatusTumor Cells, CulturedRetinoblastoma ProteinRadiation ToleranceHeLa CellsFibroblastsCyclin B1Molecular Sequence DataModels, BiologicalSaccharomyces cerevisiae ProteinsGenomic InstabilityCyclin-Dependent Kinase 2S Phase Cell Cycle CheckpointsBlotting, WesternRNA, Small InterferingSchizosaccharomycesCyclin-Dependent Kinase Inhibitor p27Cell NucleusSaccharomyces cerevisiaeDNATime FactorsNocodazoleCyclin EAntineoplastic AgentsRNA, MessengerUltraviolet RaysCyclin D1Enzyme ActivationSchizosaccharomyces pombe ProteinsTransfectionCaspasesGene Expression RegulationHistonesProto-Oncogene ProteinsAmino Acid SequenceEnzyme InhibitorsDNA Breaks, Double-StrandedCyclin AIntracellular Signaling Peptides and ProteinsProtein BindingCaspase 3Genes, p53Transcription FactorsApoptosis Regulatory ProteinsCDC2-CDC28 KinasesProto-Oncogene Proteins c-bcl-2Down-RegulationFungal ProteinsBromodeoxyuridineChromosomal InstabilityGene Expression Regulation, NeoplasticRNA InterferenceBase SequenceCell DifferentiationCarrier ProteinsMenstrual CycleBRCA1 Protein