Our evaluation of this antibody with western blotting did reveal an ability to recognize PML::RARA in APL cells with the bcr1 fusion, but it also recognizes nonspecific proteins of a similar molecular weight in primary human AML cells and human AML cell lines that do not contain the PML::RARA fusion (SI Appendix, Fig. S1C). The gene discussed is RARA; the disease is acute promyelocytic leukemia.