Activated T-cell survival in the presence of GSH inhibitors. IL-2–deprived T cells were incubated with increasing concentrations of BSO (A) and DEM (B), in the presence (•) and absence (○) of GSH (3 mmol/L). Percent surviving cells (means ± SEM of triplicate cultures) was determined following incubation for 24 hours. Similar results were obtained in a further independent experiment.