Cell CycleCell Cycle ProteinsGenes, cdcCheckpoint Kinase 2DNA DamageG2 PhaseCell Cycle CheckpointsMitosisProtein-Serine-Threonine KinasesAtaxia Telangiectasia Mutated ProteinsS PhaseDNA RepairProtein KinasesG2 Phase Cell Cycle CheckpointsHydroxyureaSpindle ApparatusDNA-Binding ProteinsM Phase Cell Cycle CheckpointsG1 PhaseNuclear ProteinsSaccharomyces cerevisiae ProteinsDNA ReplicationGamma RaysTumor Suppressor Protein p53SchizosaccharomycesFungal ProteinsSchizosaccharomyces pombe ProteinsSaccharomyces cerevisiaeMad2 ProteinsMutationTumor Suppressor ProteinsAtaxia TelangiectasiaUltraviolet RaysRadiation, IonizingChromosomal Instabilitycdc25 PhosphatasesGenes, FungalPhosphorylationCyclinsCyclin-Dependent Kinase Inhibitor p21CDC2 Protein KinaseCyclin BRadiation ToleranceRad52 DNA Repair and Recombination ProteinIntracellular Signaling Peptides and ProteinsDNA, FungalGenomic InstabilityCell DivisionApoptosisMolecular Sequence DataG1 Phase Cell Cycle CheckpointsDNA Breaks, Double-StrandedCyclin B1S Phase Cell Cycle CheckpointsCell Line, TumorCell LineDNA Repair EnzymesNocodazoleSignal TransductionHeLa CellsGene DeletionRetinoblastoma ProteinBase SequenceFibroblastsBRCA1 ProteinChromosomes, FungalAneuploidyModels, BiologicalMethyl MethanesulfonateRepressor ProteinsCDC28 Protein Kinase, S cerevisiaeFlow CytometryHistonesCyclin-Dependent Kinase 2DNAGenes, p53PhenotypeCell NucleusKinetochoresCell ProliferationTumor Cells, CulturedNeoplasm ProteinsCell SurvivalCyclin EProtein BindingAmino Acid SequenceMimosineRecombination, GeneticRNA, Small InterferingAllelesCDC2-CDC28 KinasesGene Expression Regulation, NeoplasticCells, CulturedCyclin-Dependent KinasesDose-Response Relationship, RadiationCalcium-Binding ProteinsCaffeineNucleic Acid Synthesis InhibitorsAphidicolinCyclin A