Cell Cycle ProteinsCheckpoint Kinase 2Cell CycleDNA DamageGenes, cdcCell Cycle CheckpointsG2 PhaseProtein-Serine-Threonine KinasesMitosisDNA RepairAtaxia Telangiectasia Mutated ProteinsDNA-Binding ProteinsProtein KinasesS PhaseSaccharomyces cerevisiae ProteinsNuclear ProteinsSchizosaccharomyces pombe ProteinsSpindle ApparatusMad2 ProteinsSaccharomyces cerevisiaeSchizosaccharomycesRad52 DNA Repair and Recombination ProteinM Phase Cell Cycle CheckpointsG2 Phase Cell Cycle CheckpointsMolecular Sequence DataDNA ReplicationG1 PhasePhosphorylationKinetochoresMutationFungal ProteinsTumor Suppressor Protein p53Rad51 RecombinaseTumor Suppressor ProteinsAmino Acid SequenceDNA Repair EnzymesHydroxyureaDNA Breaks, Double-StrandedGamma RaysProtein BindingRadiation, IonizingNocodazoleHeLa CellsCdc20 ProteinsCyclin BCDC2 Protein KinaseAtaxia TelangiectasiaGenomic InstabilityIntracellular Signaling Peptides and Proteinscdc25 PhosphatasesCyclin-Dependent Kinase Inhibitor p21Recombination, GeneticSignal TransductionDNA, FungalCyclinsCell LineApoptosisUltraviolet RaysCell DivisionSequence Homology, Amino AcidRadiation ToleranceDNACyclin B1MetaphaseBase SequenceCell Line, TumorModels, BiologicalChromosomal InstabilityDNA HelicasesChromosome SegregationG1 Phase Cell Cycle CheckpointsMethyl MethanesulfonateRepressor ProteinsCarrier ProteinsCell NucleusExonucleasesBRCA1 ProteinHistonesFibroblastsMeiosisProteinsS Phase Cell Cycle CheckpointsProtein Structure, TertiaryTumor Cells, CulturedEndonucleasesFlow CytometryChromosomal Proteins, Non-HistoneRetinoblastoma ProteinUbiquitin-Protein Ligase ComplexesCalcium-Binding ProteinsRecombinational DNA RepairRNA, Small InterferingRecombinant Fusion ProteinsAnaphase-Promoting Complex-CyclosomeCell ProliferationCells, CulturedTranscription FactorsTwo-Hybrid System TechniquesSequence AlignmentCell Survival