Cell CycleCell Cycle ProteinsDNA DamageG2 PhaseGenes, cdcAtaxia Telangiectasia Mutated ProteinsProtein-Serine-Threonine KinasesCheckpoint Kinase 2DNA RepairCell Cycle CheckpointsTumor Suppressor Protein p53MitosisDNA-Binding ProteinsNuclear ProteinsS PhaseG1 PhaseProtein KinasesG2 Phase Cell Cycle CheckpointsHydroxyureaCyclinsDNA ReplicationM Phase Cell Cycle Checkpointscdc25 PhosphatasesSpindle ApparatusTumor Suppressor ProteinsGamma RaysCDC2 Protein KinaseCyclin-Dependent Kinase Inhibitor p21MutationSchizosaccharomycesSaccharomyces cerevisiae ProteinsCell DivisionPhosphorylationRadiation, IonizingSchizosaccharomyces pombe ProteinsAtaxia TelangiectasiaFungal ProteinsSaccharomyces cerevisiaeCyclin BMolecular Sequence DataApoptosisRadiation ToleranceChromosomal InstabilityUltraviolet RaysCell Line, TumorCell LineSignal TransductionHeLa CellsRetinoblastoma ProteinG1 Phase Cell Cycle CheckpointsGenes, FungalCell ProliferationMad2 ProteinsBase SequenceGenomic InstabilityNocodazoleModels, BiologicalCyclin B1HistonesRepressor ProteinsS Phase Cell Cycle CheckpointsAmino Acid SequenceCyclin EIntracellular Signaling Peptides and ProteinsCyclin ADNA Breaks, Double-StrandedGene Expression RegulationBRCA1 ProteinCyclin-Dependent Kinase 2Cyclin-Dependent KinasesFibroblastsDNATranscription FactorsTranscription, GeneticTumor Cells, CulturedFlow CytometryCell NucleusProtein BindingCyclin D1DNA, FungalCells, CulturedKinetochoresGene Expression ProfilingGenes, p53PhenotypeRNA, MessengerGene DeletionGene Expression Regulation, NeoplasticCell SurvivalRNA, Small InterferingTime FactorsNucleic Acid Synthesis InhibitorsCDC2-CDC28 KinasesDNA Repair EnzymesPromoter Regions, GeneticCyclin-Dependent Kinase Inhibitor p27MimosineCaffeine14-3-3 ProteinsExonucleases