In those studies, where the expression in macrophages and blood cells was examined and where molecular-weight markers were indicated, different molecular weights of the A20 protein were reported, i.e., 70 kDa (B-cells from healthy donors and whole blood cells from patients with chronic lymphocytic leukemia [85], 82 kDa (mouse RAW264.7 cell line [86], and around 90 kDa (monocytes from healthy donors and patients with poly-autoimmunity [31], activated T-cells [28]). The gene discussed is TNFAIP3; the disease is B-cell chronic lymphocytic leukemia.