Normal NK-mediated killing in the absence of Eri1. Lethally irradiated CD45.1⁺ mice were reconstituted with CD45.2⁺ B6 WT or Eri1^−/− fetal liver cells. Ten weeks later, splenic NK cells pooled from 3-4 mice were incubated with ⁵¹Cr-labeled target (A) Ba/F3 cells or (B) Ba/F3 cells stably expressing MCMV m157. Error bars indicate SD for triplicate measurements. Data are representative of 2 independent experiments.