Cell CycleCell Cycle ProteinsGenes, cdcCheckpoint Kinase 2DNA DamageG2 PhaseCell Cycle CheckpointsMitosisProtein-Serine-Threonine KinasesAtaxia Telangiectasia Mutated ProteinsS PhaseProtein KinasesDNA RepairSpindle ApparatusG2 Phase Cell Cycle CheckpointsHydroxyureaDisease ProgressionM Phase Cell Cycle CheckpointsG1 PhaseDNA-Binding ProteinsNuclear ProteinsTumor Suppressor Protein p53DNA ReplicationGamma RaysMad2 ProteinsSchizosaccharomycesTumor Suppressor ProteinsSaccharomyces cerevisiae ProteinsMutationSchizosaccharomyces pombe ProteinsFungal ProteinsSaccharomyces cerevisiaeAtaxia Telangiectasiacdc25 PhosphatasesChromosomal InstabilityRadiation, IonizingPhosphorylationCyclinsCyclin-Dependent Kinase Inhibitor p21Ultraviolet RaysCDC2 Protein KinaseCyclin BGenes, FungalCell DivisionApoptosisRadiation ToleranceIntracellular Signaling Peptides and ProteinsGenomic InstabilityCell Line, TumorG1 Phase Cell Cycle CheckpointsMolecular Sequence DataSignal TransductionCyclin B1Cell LineDNA, FungalS Phase Cell Cycle CheckpointsNocodazoleRetinoblastoma ProteinHeLa CellsFibroblastsDNA Breaks, Double-StrandedGene DeletionBase SequenceModels, BiologicalAneuploidyFlow CytometryCell ProliferationCyclin-Dependent Kinase 2Repressor ProteinsBRCA1 ProteinCDC28 Protein Kinase, S cerevisiaeHistonesTumor Cells, CulturedPhenotypeGene Expression Regulation, NeoplasticGenes, p53Chromosomes, FungalNeoplasm ProteinsCell NucleusKinetochoresCyclin EDNACell SurvivalCyclin-Dependent KinasesRNA, Small InterferingCells, CulturedMimosineCDC2-CDC28 KinasesTime FactorsDNA Repair EnzymesMethyl MethanesulfonateCyclin AAmino Acid SequenceProtein BindingCalcium-Binding ProteinsAllelesCyclin-Dependent Kinase Inhibitor p27CaffeineCyclin D1Aphidicolin