Cell Cycle ProteinsCheckpoint Kinase 2Cell CycleDNA DamageGenes, cdcProtein-Serine-Threonine KinasesCell Cycle CheckpointsG2 PhaseMitosisAtaxia Telangiectasia Mutated ProteinsProtein KinasesDNA RepairDNA-Binding ProteinsS PhasePhosphorylationSaccharomyces cerevisiae ProteinsNuclear ProteinsSchizosaccharomyces pombe ProteinsSpindle ApparatusMad2 ProteinsMolecular Sequence DataSaccharomyces cerevisiaeSchizosaccharomycesMutationM Phase Cell Cycle CheckpointsG1 PhaseRad52 DNA Repair and Recombination ProteinG2 Phase Cell Cycle CheckpointsDNA ReplicationKinetochoresAmino Acid SequenceTumor Suppressor Protein p53Tumor Suppressor ProteinsFungal ProteinsRad51 RecombinaseDNA Repair EnzymesProtein BindingCell LineHydroxyureaDNA Breaks, Double-StrandedCDC2 Protein KinaseGamma RaysIntracellular Signaling Peptides and ProteinsRadiation, IonizingHeLa CellsNocodazoleCyclin BSignal TransductionApoptosiscdc25 PhosphatasesCdc20 ProteinsAtaxia TelangiectasiaCyclin-Dependent Kinase Inhibitor p21Cell DivisionGenomic InstabilityCyclinsRecombination, GeneticCell Line, TumorUltraviolet RaysDNA, FungalSerinePhosphoproteinsModels, BiologicalEnzyme ActivationSequence Homology, Amino AcidCyclin B1Radiation ToleranceDNACells, CulturedMetaphaseHistonesCarrier ProteinsCell NucleusFibroblastsChromosomal InstabilityBase SequenceDNA HelicasesChromosome SegregationG1 Phase Cell Cycle CheckpointsRNA, Small InterferingRepressor ProteinsMethyl MethanesulfonateBlotting, WesternBRCA1 ProteinProtein Structure, TertiaryTumor Cells, CulturedMeiosisExonucleasesTransfectionCalcium-Binding ProteinsCell ProliferationRetinoblastoma ProteinS Phase Cell Cycle CheckpointsCell SurvivalFlow CytometryRecombinant Fusion ProteinsEnzyme InhibitorsChromosomal Proteins, Non-HistoneProtein-Tyrosine KinasesTime Factors