Most proteins that were higher expressed in APL were involved in the pro‐apoptotic pathway (e.g., BCL2, BCL2L1, DIABLO, YAP1p, YWHAZ) or were linked to a higher proliferation (e.g., CDKN2A, PIK3CA), which may suggest a more pro‐apoptotic tendency of those cells, and that once the differentiation block is abrogated by the ATRA treatment, those cells tend to be more sensitive to the ATO‐induced apoptosis. The gene discussed is BCL2; the disease is acute promyelocytic leukemia.