It is important to note that with the conditions applied (1 μM ABT‐199 for 2 h) ABT‐199 was potent at inducing cell death in Bcl‐2‐dependent cancer cells, including the activated B‐cell like lymphoma cancer cell line Ri‐1, the germinal centre B‐cell‐like lymphoma cell line OCI‐LY‐1 and primary cells derived from CLL patients (Figure 5E,F). This evidence concerns the gene BCL2 and cancer.