Cell CycleCell Cycle ProteinsCheckpoint Kinase 2Protein-Serine-Threonine KinasesCell Cycle CheckpointsDNA DamageG2 PhaseGenes, cdcProtein KinasesAtaxia Telangiectasia Mutated ProteinsMitosisS PhaseG2 Phase Cell Cycle CheckpointsG1 PhasePhosphorylationProtein Kinase InhibitorsDNA RepairTumor Suppressor Protein p53Tumor Suppressor ProteinsDNA-Binding ProteinsCDC2 Protein KinasePhosphatidylinositol 3-KinasesNuclear ProteinsM Phase Cell Cycle CheckpointsApoptosisAtaxia TelangiectasiaSignal TransductionGamma RaysCyclin-Dependent Kinase Inhibitor p21DNA ReplicationCyclinsRadiation, Ionizingcdc25 PhosphatasesCell Line, TumorHydroxyureaMutationCell DivisionSpindle ApparatusCyclin BCell LineMAP Kinase Signaling SystemEnzyme InhibitorsRadiation ToleranceCyclin-Dependent KinasesProtein-Tyrosine KinasesGenomic InstabilitySaccharomyces cerevisiae ProteinsHeLa CellsG1 Phase Cell Cycle CheckpointsCyclin-Dependent Kinase 2SchizosaccharomycesModels, BiologicalMolecular Sequence DataFibroblastsCDC2-CDC28 KinasesIntracellular Signaling Peptides and ProteinsCyclin B1Saccharomyces cerevisiaeCell ProliferationUltraviolet RaysS Phase Cell Cycle CheckpointsSchizosaccharomyces pombe ProteinsNocodazoleCells, CulturedTumor Cells, Culturedsrc-Family KinasesProtein BindingRetinoblastoma ProteinCell SurvivalFlow CytometryDNA Breaks, Double-StrandedEnzyme ActivationChromosomal InstabilityCalcium-Calmodulin-Dependent Protein KinasesRNA, Small InterferingBlotting, Westernp38 Mitogen-Activated Protein KinasesAmino Acid SequenceProto-Oncogene ProteinsAntineoplastic AgentsFungal ProteinsCell NucleusAurora KinasesTransfectionBRCA1 ProteinHistonesCyclin-Dependent Kinase Inhibitor p27rho-Associated KinasesDNATime FactorsBase SequenceGenes, p53KinetochoresCyclin EProtein Kinase CCarrier ProteinsMitogen-Activated Protein Kinase 1RNA InterferenceMitogen-Activated Protein Kinase KinasesMorpholines