Expression of the murine Tmevpg1 and Ifng genes in CD4+ (A) and CD8+ (B and C) splenocytes. Hours after activation by PMA and ionomycin are indicated. TS, total splenocytes; W, 48 h after removal of PMA and ionomycin and washing; +, positive control; −, negative control (water); IFN-γ, gamma interferon.