Cell Cycle ProteinsCheckpoint Kinase 2ApoptosisCell CycleDNA DamageGenes, cdcCell Cycle CheckpointsG2 PhaseProtein-Serine-Threonine KinasesMitosisDNA RepairAtaxia Telangiectasia Mutated ProteinsDNA-Binding ProteinsS PhaseProtein KinasesSaccharomyces cerevisiae ProteinsNuclear ProteinsSchizosaccharomyces pombe ProteinsSpindle ApparatusMad2 ProteinsTumor Suppressor Protein p53G2 Phase Cell Cycle CheckpointsSchizosaccharomycesM Phase Cell Cycle CheckpointsRad52 DNA Repair and Recombination ProteinG1 PhaseSaccharomyces cerevisiaeDNA ReplicationPhosphorylationKinetochoresMutationTumor Suppressor ProteinsFungal ProteinsMolecular Sequence DataRad51 RecombinaseDNA Repair EnzymesGamma RaysHydroxyureaDNA Breaks, Double-StrandedRadiation, IonizingAmino Acid SequenceNocodazoleSignal TransductionCyclin-Dependent Kinase Inhibitor p21Cell Line, TumorHeLa CellsCell DivisionCDC2 Protein KinaseCyclin BCdc20 ProteinsIntracellular Signaling Peptides and ProteinsAtaxia TelangiectasiaGenomic InstabilityProtein Bindingcdc25 PhosphatasesCyclinsRecombination, GeneticCell LineDNA, FungalUltraviolet RaysRadiation ToleranceCyclin B1Cell SurvivalDNAMetaphaseModels, BiologicalChromosomal InstabilityFlow CytometrySequence Homology, Amino AcidTumor Cells, CulturedG1 Phase Cell Cycle CheckpointsDNA HelicasesChromosome SegregationCarrier ProteinsFibroblastsCell ProliferationRNA, Small InterferingHistonesMethyl MethanesulfonateCells, CulturedCell NucleusExonucleasesBRCA1 ProteinRepressor ProteinsBase SequenceMeiosisS Phase Cell Cycle CheckpointsRetinoblastoma ProteinBlotting, WesternEnzyme ActivationEndonucleasesChromosomal Proteins, Non-HistoneCaspasesCalcium-Binding ProteinsUbiquitin-Protein Ligase ComplexesRNA InterferenceApoptosis Regulatory ProteinsRecombinational DNA RepairAnaphase-Promoting Complex-CyclosomeGenes, p53