BCOR has several interacting regions in addition to BCL6, including AF9 (a region that interacts with AF9, the common mixed-lineage leukemia fusion partner), NSPC1 (a region that interacts with nervous system polycomb1), and Ankyrin (a region involved in protein–protein interaction) (Ghetu et al., 2008). Here, MLLT3 is linked to leukemia.