Consistent with mRNA data, the highest levels of LILRB1 protein were found in monocytic (U937) and bi-phenotypic B-myelomonocytic (MV4;11) cell lines (Fig. 8B) as well as in M5 AML primary cells (Fig. 8C, Supplementary Table 6). Here, LILRB1 is linked to acute myeloid leukemia.