Figure 3.
IL-2-dependent proliferative responses of CD8+ 2C cells to peptides presented by Drosophila cells transfected with Ld only. Responses to p2Ca (a) and QL9 (b) peptides were measured by culturing 5 × 104 purified CD8+ 2C cells with 2 × 105 Drosophila cells in the presence or absence of the indicated concentrations of peptides for 3 days. [3H]thymidine was added during the last 8 hr of culture; recombinant IL-2 was added at a final concentration of 20 units/ml. The data refer to the mean of triplicate cultures.