Expressed both in AML-MSCs and R-MSCs and not expressed in D-MSCs18 proteins (17 mapped genes ANKRD20A8P, B2M, BCAT1, C1S, HLA-A, MIF, CHIC2, CHMP1A, HAGH, PPARGC1A, PPP1R3F, PTK2B, SRCAP, SYT7, and TCTN3). This evidence concerns the gene PTK2B and acute myeloid leukemia.