Cell CycleCell Cycle ProteinsGenes, cdcCheckpoint Kinase 2DNA DamageG2 PhaseCell Cycle CheckpointsMitosisProtein-Serine-Threonine KinasesAtaxia Telangiectasia Mutated ProteinsCell Line, TumorS PhaseProtein KinasesDNA RepairTumor Suppressor Protein p53HydroxyureaG2 Phase Cell Cycle CheckpointsSpindle ApparatusM Phase Cell Cycle CheckpointsDNA-Binding ProteinsG1 PhaseTumor Suppressor ProteinsNuclear ProteinsMutationGamma RaysDNA ReplicationTumor Cells, CulturedMad2 ProteinsSaccharomyces cerevisiae ProteinsSchizosaccharomycesFungal ProteinsSchizosaccharomyces pombe ProteinsCell DivisionPhosphorylationSaccharomyces cerevisiaeRadiation, IonizingChromosomal InstabilityAtaxia TelangiectasiaApoptosiscdc25 PhosphatasesCyclin-Dependent Kinase Inhibitor p21CyclinsUltraviolet RaysRadiation ToleranceCDC2 Protein KinaseMolecular Sequence DataCyclin BGenes, FungalCell LineSignal TransductionIntracellular Signaling Peptides and ProteinsGenomic InstabilityGeneticsCell ProliferationG1 Phase Cell Cycle CheckpointsBase SequenceNeoplasm ProteinsFlow CytometryNeoplasmsHeLa CellsPhenotypeFibroblastsCell SurvivalCyclin B1Models, BiologicalGene Expression Regulation, NeoplasticGene DeletionDNA, FungalRetinoblastoma ProteinS Phase Cell Cycle CheckpointsNocodazoleGenes, p53DNA Breaks, Double-StrandedAntineoplastic AgentsRepressor ProteinsAneuploidyBRCA1 ProteinRNA, Small InterferingCells, CulturedDNACell NucleusTumor Markers, BiologicalCyclin-Dependent Kinase 2HistonesTime FactorsTransfectionCDC28 Protein Kinase, S cerevisiaeAmino Acid SequenceGenes, Tumor SuppressorRNA, MessengerAllelesNeoplasms, ExperimentalBlotting, WesternChromosomes, FungalProtein BindingCyclin EKinetochoresTumor BurdenDNA PrimersHCT116 Cells