Ataxia Telangiectasia Mutated ProteinsAtaxia TelangiectasiaTumor Suppressor ProteinsTelangiectasisCell Cycle ProteinsProtein-Serine-Threonine KinasesTelangiectasia, Hereditary HemorrhagicDNA-Binding ProteinsAtaxiaDNA DamageCerebellar AtaxiaRetinal TelangiectasisFriedreich AtaxiaSpinocerebellar AtaxiasProtein KinasesCheckpoint Kinase 2Phosphatidylinositol 3-KinasesRadiation, IonizingPhosphorylationDNA RepairGait AtaxiaGamma RaysDNA-Activated Protein KinaseRadiation ToleranceTumor Suppressor Protein p53MAP Kinase Signaling SystemDNA Breaks, Double-StrandedMutationEpistaxisProtein Kinase InhibitorsPyronesActivin Receptors, Type IINuclear ProteinsCell CycleFibroblastsSignal TransductionArteriovenous MalformationsHistonesCell LineCalcium-Calmodulin-Dependent Protein KinasesDose-Response Relationship, RadiationNijmegen Breakage SyndromeApoptosissrc-Family KinasesCell Line, TumorStreptonigrinG2 PhaseCREST SyndromeCells, CulturedDNA ReplicationCDC2 Protein KinaseProtein Kinase CCell Survivalp38 Mitogen-Activated Protein KinasesUltraviolet RaysCyclic AMP-Dependent Protein KinasesSerineMorpholinesIntracellular Signaling Peptides and ProteinsChromosome BreakageMicrocephalyCell Line, TransformedMitogen-Activated Protein Kinase 1Molecular Sequence DataS PhaseHeterozygoteNucleic Acid Synthesis InhibitorsGenes, cdcHeLa CellsX-RaysMice, KnockoutChromosome AberrationsInfrared RaysEnzyme ActivationBase Sequencep21-Activated KinasesReplication Protein AMitogen-Activated Protein Kinase KinasesJNK Mitogen-Activated Protein KinasesBlotting, WesternProteinsDNAProtein BindingMitogen-Activated Protein Kinase 3Genomic InstabilityDNA Repair EnzymesPhenotypeLymphocytesRNA, Small InterferingProtein-Tyrosine KinasesAndrostadienesCreatine KinaseTransfectionImmunoblottingCyclin-Dependent KinasesMAP Kinase Kinase KinasesG2 Phase Cell Cycle CheckpointsCell NucleusMutation, MissenseCell Cycle Checkpoints