Cell CycleG2 PhaseCell Cycle ProteinsG1 PhaseS PhaseCell Cycle CheckpointsGene Products, vprCheckpoint Kinase 2DNA DamageGenes, cdcCell DivisionMitosisAtaxia Telangiectasia Mutated ProteinsProtein-Serine-Threonine KinasesPhosphorylationG2 Phase Cell Cycle CheckpointsCell Line, TumorDisease ProgressionTumor Suppressor Protein p53Protein KinasesDNA RepairTumor Suppressor ProteinsCyclinsDNA-Binding ProteinsCyclin-Dependent Kinase Inhibitor p21DNA ReplicationNuclear Proteinscdc25 PhosphatasesM Phase Cell Cycle CheckpointsCDC2 Protein KinaseApoptosisGamma RaysCyclin BHydroxyureaAtaxia TelangiectasiaRadiation, IonizingSpindle ApparatusG1 Phase Cell Cycle CheckpointsMutationRetinoblastoma ProteinSignal TransductionCell LineRadiation ToleranceCyclin B1Cell ProliferationSaccharomyces cerevisiae ProteinsGenomic InstabilitySchizosaccharomycesHeLa CellsS Phase Cell Cycle CheckpointsCyclin-Dependent Kinase 2Saccharomyces cerevisiaeFlow CytometryMolecular Sequence DataModels, BiologicalFibroblastsNocodazoleSchizosaccharomyces pombe ProteinsUltraviolet RaysCyclin ETumor Cells, CulturedCyclin-Dependent Kinase Inhibitor p27Cell NucleusDNA Breaks, Double-StrandedHistonesFungal ProteinsChromosomal InstabilityDNACyclin ACells, CulturedCDC2-CDC28 KinasesCyclin D1Cell SurvivalTime FactorsGenes, p53Menstrual CycleBRCA1 ProteinRNA, Small InterferingAmino Acid SequenceMimosineProtein BindingInterphaseIntracellular Signaling Peptides and ProteinsCyclin-Dependent Kinase 4Antineoplastic AgentsKinetochoresCyclin-Dependent KinasesBase SequenceBlotting, WesternTranscription FactorsRNA, MessengerGene Expression Regulation, NeoplasticGene Expression RegulationCentrosomeAphidicolinTransfectionCarrier ProteinsG0 PhaseDNA Repair EnzymesRNA Interference