Fig. 7.
Tumor rejection by 15 × 106 of CD28−/− P1CTL.
The group that received no T cells consisted of 4 mice, whereas the group that received CD28−/− T cells consisted of 5 mice. Differences in the sizes of J558-Neo and J558-B7 tumors were statistically significant from day 17 on (Welch t test, 2-sided P value between .05 and .03).
