Fig. 1.

Patient-derived primary myeloma cells express HLA-class I and HLA-E on the cell surface. Mononuclear cells obtained from bone marrow aspirates of patients with myeloma (n = 8) or plasma cell leukemia (PCL; n = 1) were stained for CD38, HLA-class I and HLA-E and were analyzed by flow cytometry. a Histograms show HLA-class I or HLA-E cell surface expression (open histograms) on CD38^high cells for the myeloma or PCL patients. Matched isotype controls are depicted in gray histograms. b Graph shows MFI data obtained from the histograms. Each dot depicts data from one patient