IKKβ expression in T cells is required for MC57-SIY tumor rejection. a) One million MC57-SIY tumor cells were subcutaneously injected into CD4-cre x IKKβfl/fl mice, and tumor growth was measured over time. b) Fully mismatched skin from wildtype BALB/c mice (H-2d) was transplanted into CD4-cre x IKKβfl/fl mice (H-2b). Results are representative of at least 2 experiments. ***p < 0.001.