RI-BPI inhibits the growth of primary human DLBCLs. Single-cell suspensions were obtained from lymph node biopsies of patients suspected of having DLBCL and were treated with either BPI 10 μM (bars) or CP 10 μM (line). indicates non-DLBCL samples; and ■, DLBCLs. The y-axis represents the percentage of viable cells compared with control peptide, which is represented by the line at 100%. Error bars represent the SEM for triplicates. BCL6 status as assessed by immunohistochemistry is shown on the bottom for each DLBCL case. HD indicates Hodgkin disease; TCL, T-cell lymphoma; and Misc, miscellaneous diagnosis.