Expression of ULBP2 and ULBP3 in NHL B cells. ULPB2 (A-D) or ULBP3 (E-H) expression at the cell surface of PB or LN B lymphocytes in FL NHL (A-B, E-F, 1 representative case of 15 studied) or of PB or BM B lymphocytes in B-CLL (C-D, G-H, 1 representative case of 10 studied), as indicated. B lymphocytes are identified by FITC-conjugated anti-CD20 mAb. Expression of ULBP2 and ULBP3 was assessed by indirect immunofluorescence, with the specific mAbs followed by isotype-specific PE-GAM immunoglobulin and FACS analysis. Results are expressed as log green fluorescence intensity (au) versus log red fluorescence intensity (au).