Figure 2.
Activation of T cells from transgenic mice is independent of the B7-CD28 interaction. Purified T cells were cocultured for 3 days with the different stimulator cells. Expression of the CD25 activation marker was evaluated in Thy1.2+ cells by FACS analysis. The upper part of the figure shows one set of actual dot plots, and the lower part summarizes the data of CD25 expression on T cells undergoing the various treatments (□, WT; ▧, Tg-TPCRΔCD28; ▦, Tg 8.4; ▪, Tg 8.7). Results represent 3 separate experiments, each with 3 mice/group. The percentage in the dot plot represents the fraction of lymphocytes that score positive for both Thy1.2 and CD25+. The error bars represent the standard deviation of triplicates.