Cell CycleCell Cycle ProteinsCell DivisionGenes, cdcMitosisG2 PhaseDNA DamageS PhaseCell Cycle CheckpointsProtein-Serine-Threonine KinasesCheckpoint Kinase 2G1 PhaseDNA Replicationcdc25 PhosphatasesProtein KinasesCyclinsSpindle ApparatusCDC2 Protein KinaseMutationDNA-Binding ProteinsNuclear ProteinsAtaxia Telangiectasia Mutated ProteinsSaccharomyces cerevisiaeHydroxyureaSchizosaccharomycesG2 Phase Cell Cycle CheckpointsPhosphorylationSaccharomyces cerevisiae ProteinsDNA RepairFungal ProteinsTumor Suppressor Protein p53Cyclin-Dependent KinasesTumor Suppressor ProteinsCyclin BMolecular Sequence DataRetinoblastoma ProteinCyclin-Dependent Kinase Inhibitor p21M Phase Cell Cycle CheckpointsApoptosisSchizosaccharomyces pombe ProteinsCyclin-Dependent Kinase 2Cell ProliferationCell Line, TumorDisease ProgressionSignal TransductionCyclin B1Genes, FungalCell LineCyclin-Dependent Kinase Inhibitor p27Models, BiologicalCyclin AHeLa CellsGamma RaysCell NucleusCyclin D1Base SequenceFlow CytometryCyclin EAmino Acid SequenceCDC2-CDC28 KinasesMad2 ProteinsG1 Phase Cell Cycle CheckpointsCells, CulturedCyclin-Dependent Kinase 4Time FactorsInterphaseDNAUltraviolet RaysFibroblastsProtein BindingChromosomal InstabilityPhenotypeDNA, FungalTranscription FactorsRadiation, IonizingTumor Cells, CulturedCentrosomeHistonesUbiquitin-Protein Ligase ComplexesIntracellular Signaling Peptides and ProteinsAtaxia TelangiectasiaAnaphase-Promoting Complex-CyclosomeGene Expression RegulationRNA, Small InterferingRNA, MessengerTranscription, GeneticCell SurvivalCaulobacter crescentusGenomic InstabilityBlotting, WesternNocodazoleCarrier ProteinsS Phase Cell Cycle CheckpointsRNA InterferenceRadiation ToleranceCdc20 ProteinsRepressor ProteinsG0 PhaseTransfectionGene Expression Regulation, Neoplastic