This was confirmed when we isolated spleen cells from TiRP-tumor-bearing mice and incubated them with L1210.P1A.B7-1 cells to activate P1A-specific T cells: after 48 h, we compared Fas expression on CD8+ T cells that were P1A-specific or not (Supplementary Fig. 10a). The gene discussed is CD8A; the disease is neoplasm.