Ataxia TelangiectasiaAtaxia Telangiectasia Mutated ProteinsTelangiectasisTelangiectasia, Hereditary HemorrhagicAtaxiaTumor Suppressor ProteinsCerebellar AtaxiaCell Cycle ProteinsProtein-Serine-Threonine KinasesGenetic Diseases, InbornRetinal TelangiectasisFriedreich AtaxiaDNA-Binding ProteinsDNA DamageSpinocerebellar AtaxiasMutationRadiation, IonizingCheckpoint Kinase 2DNA RepairGait AtaxiaGamma RaysRadiation ToleranceMutation, MissensePedigreeTumor Suppressor Protein p53DNA Breaks, Double-StrandedDNA-Activated Protein KinaseFibroblastsEpistaxisPhosphorylation