Effect of EGTA and CMA on CTL-mediated apoptosis of resting (left) and CD40-activated (right) CLL B cells.

A CTL assay was performed with (diagonal hatched bar) or without (black bar) 2 mmol/L EGTA, or CTL effectors were pretreated for 2 hours with 10 nmol/L CMA (open bars). CLL B target cells alone without effector cells (cross hatched bars). Data are the mean of 3 experiments plus or minus SD.