CD95 molecule is expressed on freshly isolated lymphoma B cells. Flow cytometric analyses were performed on Jurkat cells (A), nontumoral B cells (B; Donor NT-1), and lymphoma B cells (C through F). Lymphoma B cells were obtained from LCL-1 (C), MCL-5 (D), FL-6 (E), and DLCL-4 (F) patients. Cells were stained with anti-CD95 MoAb CH-11 (dashed line) or with IgM control MoAb (solid line) followed by PE-conjugated antimouse IgM. Percentages of positive cells and MFI values (in brackets) are indicated for each cell population.