Captopril does not inhibit Fas-mediated apoptosis in Jurkat cells. Jurkat cells were cultured in 24-well plates (5 × 105 cells/well), with or without captopril. Apoptosis was induced by the addition of anti-human Fas antibody, CH-11. Twenty-four hours later, cell viability was determined by trypan blue dye exclusion. Results are expressed as the mean ± s.d. of triplicate cultures. Error bars are less than symbol width when they are not apparent. ▪, Control; Δ, CH-11 (50 ng/ml); ▾, CH-11 (100 ng/ml).