Western blots indicated that BCL11A-XL is robustly expressed in the B-cell lymphoma DOHH2 cells and U937 myeloid leukaemia cells, whereas expression levels are very low in the erythroleukaemia cell line K562 and the promyelocytic leukaemia HL60 cell line (Supplementary Figure S5) (13,37,40). Here, BCL11A is linked to acute promyelocytic leukemia.