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 ProteinsDNA ReplicationTumor Suppressor Protein p53Gamma RaysMad2 ProteinsSchizosaccharomycesSaccharomyces cerevisiae ProteinsTumor Suppressor ProteinsFungal ProteinsSchizosaccharomyces pombe ProteinsMutationSaccharomyces cerevisiaeAtaxia Telangiectasiacdc25 PhosphatasesChromosomal InstabilityRadiation, IonizingPhosphorylationCyclinsCyclin-Dependent Kinase Inhibitor p21Ultraviolet RaysCDC2 Protein KinaseGenes, FungalCyclin BCell DivisionRadiation ToleranceApoptosisIntracellular Signaling Peptides and ProteinsMolecular Sequence DataGenomic InstabilityG1 Phase Cell Cycle CheckpointsCell LineCell Line, TumorCyclin B1DNA, FungalSignal TransductionS Phase Cell Cycle CheckpointsHeLa CellsNocodazoleDNA Breaks, Double-StrandedFibroblastsRetinoblastoma ProteinGene DeletionBase SequenceAneuploidyModels, BiologicalRepressor ProteinsFlow CytometryBRCA1 ProteinCyclin-Dependent Kinase 2CDC28 Protein Kinase, S cerevisiaeHistonesTumor Cells, CulturedChromosomes, FungalCell ProliferationGenes, p53DNAKinetochoresCell NucleusPhenotypeNeoplasm ProteinsCells, CulturedCell SurvivalAmino Acid SequenceCyclin EEnzyme InhibitorsProtein BindingMimosineMethyl MethanesulfonateDNA Repair EnzymesCDC2-CDC28 KinasesCyclin-Dependent KinasesGene Expression Regulation, NeoplasticRNA, Small InterferingCalcium-Binding ProteinsCaffeineAphidicolinCyclin ANucleic Acid Synthesis InhibitorsAllelesAntineoplastic AgentsCyclin-Dependent Kinase Inhibitor p27