Tumor-induced apoptosis in Jurkat cells stably transfected with CrmA, Bcl-2, or Neo vector alone.

Jurkat cells were coincubated with PCI-13 cells for 16 hours. The cells were then stained with anti–CD3-PE, fixed, and stained for DNA breaks by TUNEL. TUNEL staining was assessed by flow cytometry in CD3⁺-gated cells. The percentage of TUNEL-positive cells is indicated at the right corners.