NKG7 and neoplasm: To further assess if NKG7 enhances the rate of tumor killing, we co-cultured Nkg7+/+ or Nkg7-/- T cells with anti-CD3/28-coated P815 targets cells at a ratio of 1 T cell (effector) to 5 tumor cells (targets) and measured the percent of tumor targets killed overtime for 12 hours.