Cell CycleCell Cycle ProteinsGenes, cdcCheckpoint Kinase 2DNA DamageG2 PhaseCell Cycle CheckpointsMitosisProtein-Serine-Threonine KinasesAtaxia Telangiectasia Mutated ProteinsS PhaseG2 Phase Cell Cycle CheckpointsProtein KinasesDNA RepairG1 PhaseTumor Suppressor Protein p53HydroxyureaM Phase Cell Cycle CheckpointsSpindle ApparatusDNA-Binding ProteinsNuclear ProteinsGamma RaysDNA ReplicationTumor Suppressor ProteinsAtaxia Telangiectasiacdc25 PhosphatasesRadiation, IonizingMutationPhosphorylationCyclinsSaccharomyces cerevisiae ProteinsCyclin-Dependent Kinase Inhibitor p21SchizosaccharomycesCDC2 Protein KinaseCyclin BSchizosaccharomyces pombe ProteinsSaccharomyces cerevisiaeFungal ProteinsRadiation ToleranceChromosomal InstabilityGenomic InstabilityCell DivisionUltraviolet RaysApoptosisG1 Phase Cell Cycle CheckpointsCyclin B1S Phase Cell Cycle CheckpointsMolecular Sequence DataCell LineCell Line, TumorNocodazoleSignal TransductionHeLa CellsIntracellular Signaling Peptides and ProteinsDNA Breaks, Double-StrandedRetinoblastoma ProteinFibroblastsMad2 ProteinsGenes, FungalModels, BiologicalBRCA1 ProteinFlow CytometryCyclin-Dependent Kinase 2HistonesGenes, p53DNA, FungalKinetochoresDNABase SequenceCell NucleusTumor Cells, CulturedCell ProliferationCyclin EGene DeletionMimosineCell SurvivalDNA Repair EnzymesMethyl MethanesulfonateAmino Acid SequenceRepressor ProteinsProtein BindingCDC2-CDC28 KinasesRNA, Small InterferingCells, CulturedCyclin-Dependent KinasesCaffeineCyclin APhenotypeAphidicolinNucleic Acid Synthesis InhibitorsPolyploidyCentrosomeCyclin-Dependent Kinase Inhibitor p27MetaphaseTime FactorsThioguanineDose-Response Relationship, RadiationNeoplasm ProteinsBlastulaHCT116 Cells