Cell CycleCell Cycle ProteinsGenes, cdcCheckpoint Kinase 2DNA DamageG2 PhaseCell Cycle CheckpointsMitosisProtein-Serine-Threonine KinasesCell Line, TumorAtaxia Telangiectasia Mutated ProteinsS PhaseProtein KinasesTumor Suppressor Protein p53DNA RepairHydroxyureaG2 Phase Cell Cycle CheckpointsSpindle ApparatusDNA-Binding ProteinsM Phase Cell Cycle CheckpointsTumor Suppressor ProteinsG1 PhaseNuclear ProteinsTumor Cells, CulturedMutationGamma RaysDNA ReplicationMad2 ProteinsSchizosaccharomycesSaccharomyces cerevisiae ProteinsCell DivisionFungal ProteinsSchizosaccharomyces pombe ProteinsApoptosisPhosphorylationRadiation, IonizingSaccharomyces cerevisiaeAtaxia TelangiectasiaChromosomal Instabilitycdc25 PhosphatasesCyclin-Dependent Kinase Inhibitor p21CyclinsUltraviolet RaysSignal TransductionCell ProliferationGene Expression Regulation, NeoplasticRadiation ToleranceCDC2 Protein KinaseMolecular Sequence DataCyclin BGenes, FungalCell LineNeoplasm ProteinsIntracellular Signaling Peptides and ProteinsNeoplasmsTumor Markers, BiologicalGenomic InstabilityG1 Phase Cell Cycle CheckpointsBase SequencePhenotypeCell SurvivalFlow CytometryAntineoplastic AgentsHeLa CellsFibroblastsModels, BiologicalGenes, p53Cyclin B1RNA, Small InterferingRetinoblastoma ProteinDNA, FungalS Phase Cell Cycle CheckpointsGene DeletionBreast NeoplasmsNocodazoleImmunohistochemistryDNA Breaks, Double-StrandedRepressor ProteinsRNA, MessengerTime FactorsTransfectionCell Transformation, NeoplasticAneuploidyBlotting, WesternBRCA1 ProteinCells, CulturedNeoplasms, ExperimentalTumor BurdenCell NucleusCyclin-Dependent Kinase 2HistonesDNACDC28 Protein Kinase, S cerevisiaeMice, NudeNeoplasm MetastasisGenes, Tumor SuppressorChromosomes, FungalAmino Acid SequenceReverse Transcriptase Polymerase Chain ReactionProtein Binding