The array included TNF ligands and their receptors (TRAFs), Bcl2 family members, caspases, inhibitor of apoptosis, caspase recruitment domain family members, death domain, death effector domain, and cell death-inducing DFFA-like effector family members, as well as the genes involved in the p53 and DNA-damaged induced apoptosis and ataxia telangiectasia mutated pathways. The gene discussed is BCL2; the disease is ataxia telangiectasia.