Cell CycleApoptosisCell Cycle ProteinsCell Cycle CheckpointsG2 PhaseDNA DamageCheckpoint Kinase 2Genes, cdcMitosisS PhaseAtaxia Telangiectasia Mutated ProteinsProtein-Serine-Threonine KinasesG1 PhaseG2 Phase Cell Cycle CheckpointsTumor Suppressor Protein p53DNA RepairProtein KinasesTumor Suppressor ProteinsDNA-Binding ProteinsCyclinsCell DivisionCyclin-Dependent Kinase Inhibitor p21PhosphorylationNuclear ProteinsDNA ReplicationM Phase Cell Cycle CheckpointsCell Line, Tumorcdc25 PhosphatasesGamma RaysCDC2 Protein KinaseCyclin BRadiation, IonizingHydroxyureaSignal TransductionAtaxia TelangiectasiaSpindle ApparatusCell LineG1 Phase Cell Cycle CheckpointsMutationCell ProliferationRadiation ToleranceRetinoblastoma ProteinFlow CytometryHeLa CellsCell SurvivalTumor Cells, CulturedCyclin B1Saccharomyces cerevisiae ProteinsGenomic InstabilityCells, CulturedS Phase Cell Cycle CheckpointsSchizosaccharomycesFibroblastsModels, BiologicalSaccharomyces cerevisiaeMolecular Sequence DataCyclin-Dependent Kinase 2NocodazoleCell NucleusSchizosaccharomyces pombe ProteinsUltraviolet RaysCyclin-Dependent Kinase Inhibitor p27Cyclin ERNA, Small InterferingDNADNA Breaks, Double-StrandedHistonesCaspasesBlotting, WesternAntineoplastic AgentsGenes, p53Fungal ProteinsTime FactorsEnzyme ActivationChromosomal InstabilityCyclin AApoptosis Regulatory ProteinsCDC2-CDC28 KinasesCaspase 3Cyclin D1Intracellular Signaling Peptides and ProteinsAmino Acid SequenceProtein BindingMenstrual CycleTransfectionProto-Oncogene Proteins c-bcl-2BRCA1 ProteinProto-Oncogene ProteinsEnzyme InhibitorsMimosineCarrier ProteinsGene Expression RegulationRNA, MessengerTranscription FactorsBase SequenceInterphaseRNA InterferenceInhibitor of Apoptosis ProteinsCell DeathKinetochores