Adoptive transfer experiment was carried as indicated in the schematic diagram (A). Purified CD8+ T cells from in-vitro antigen-dependant expansion of cultures (comprising 1×106 OVA257–264-specific CD8+ T cells) were transferred intravenously into naïve or tumor bearing recipient mice (tumor size, 45–90 mm2) , and donor cells in the various organs of recipients were enumerated 4 days later. Number of OVA257–264-specific CD8+ T cells in individual mice recovered from non-tumor bearing lymph nodes (B), tumor bearing lymph nodes (C) tumor bearing spleen (D) and tumor (E) of recipient WT or FtDKO mice is indicated. (B), *, WT cells in FtDKO compared to WT hosts, p = 0.02; ***, FtDKO cells in FtDKO compared to WT hosts, p = 0.0003; **, FtDKO cells compared to WT cells in WT hosts; p = 0.008. (C), *, FtDKO cells in different hosts, p = 0.011. (D), *, WT cells in different hosts, p = 0.03; * FtDKO cells in different hosts, p = 0.036. (E), *, WT cells compared to FtDKO cells in WT hosts, p = 0.034; *, FtDKO versus WT cells in FtDKO hosts, p = 0.043. Data were analyzed by unpaired t test.