Mean percentage of CD3-/DX5+ natural killer cells expressing the inhibitory receptor NKG2a in the spleen (A), lung (C), and blood (E), 14hrs following 6 consecutive cycles of SDR compared to HCC animals. Mean percentage of CD3-/DX5+ natural killer cells expressing the inhibitory receptor Ly49a in the spleen (B), lung (D), and blood (F), 14hrs following 6 consecutive cycles of SDR compared to HCC animals.* Indicates a significant difference from HCC animals (p’s≤0.05). Bars represent group means ± SEM.