Role of LAT and NTAL in polyIC NK cell effector functions. (A) polyIC NK cells were purified from control (CTR) and mutant mice and used as effectors against indicated tumor cells. Data shown are representative of at least 4 independent experiments. (B) Percentages of IFN-γ⁺ cells in gated CD3^–NK1.1⁺ cells; □ indicate polyIC NK cells from control mice (CTR); ▪, polyIC NK cells from LAT/NTAL^KO double KO. Stimulation for IFN-γ analysis was performed as described in the Figure 2 legend. Error bars represent SEM.