1x10^6 mouse splenocytes were surface stained with 0.25 ug CoraLite® Plus 647 Anti-Mouse KLRG1 (2F1) (CL647-65084, Clone: 2F1) or 0.25 ug Isotype Control, and 0.25 ug FITC Anti-Mouse NK1.1 (CD161) (PK136) (FITC-65138, Clone: PK136). Cells were not fixed.