Cell CycleCell Cycle ProteinsGenes, cdcCheckpoint Kinase 2DNA DamageG2 PhaseCell Cycle CheckpointsMitosisProtein-Serine-Threonine KinasesAtaxia Telangiectasia Mutated ProteinsS PhaseProtein KinasesDNA RepairHydroxyureaG2 Phase Cell Cycle CheckpointsSpindle ApparatusM Phase Cell Cycle CheckpointsG1 PhaseDNA-Binding ProteinsNuclear ProteinsTumor Suppressor Protein p53DNA ReplicationGamma RaysMad2 ProteinsSchizosaccharomycesSaccharomyces cerevisiae ProteinsTumor Suppressor ProteinsMutationFungal ProteinsSchizosaccharomyces pombe ProteinsSaccharomyces cerevisiaeAtaxia Telangiectasiacdc25 PhosphatasesRadiation, IonizingChromosomal InstabilityT-Lymphocytes, CytotoxicCell Line, TumorApoptosisPhosphorylationUltraviolet RaysCyclinsCyclin-Dependent Kinase Inhibitor p21Cell DivisionCDC2 Protein KinaseCyclin BGenes, FungalCell LineRadiation ToleranceMolecular Sequence DataIntracellular Signaling Peptides and ProteinsCytotoxicity, ImmunologicCell SurvivalGenomic InstabilityG1 Phase Cell Cycle CheckpointsTumor Cells, CulturedHeLa CellsFlow CytometrySignal TransductionAntineoplastic AgentsCyclin B1DNA, FungalS Phase Cell Cycle CheckpointsFibroblastsNocodazoleBase SequenceDNA Breaks, Double-StrandedCell ProliferationRetinoblastoma ProteinDrug Screening Assays, AntitumorGene DeletionCells, CulturedCytotoxinsAneuploidyModels, BiologicalBRCA1 ProteinPhenotypeRepressor ProteinsCDC28 Protein Kinase, S cerevisiaeDNACyclin-Dependent Kinase 2Antineoplastic Agents, PhytogenicHistonesNeoplasm ProteinsChromosomes, FungalAmino Acid SequenceGenes, p53Cell NucleusKinetochoresCyclin ENeoplasmsMethyl MethanesulfonateDNA Repair EnzymesMimosineProtein BindingCell DeathGene Expression Regulation, NeoplasticRNA, Small InterferingTime FactorsCDC2-CDC28 KinasesCytotoxicity Tests, Immunologic