TABLE 2.

Radiation-Induced (10 mGy) Release of IL-2Rα Receptor Stimulating Factor into the Medium^†

Control cells	Control cells + irradiated medium	50% Control cells + 50% irradiated cells + control medium
32.4 ± 3.2	40.9 ± 3.6 p <0.01	30.0 ± 4.2 n.s.

†The numbers indicate the percentage (mean ± S.D. for n = 7) of cells expressing IL-2Rα after 48 h total incubation. Irradiated cells were incubated for 24 h prior to separation of those cells from their medium and for a further 24 h incubation with control cells. Data from Xu et al. (1996).