CD158k on NK cells from healthy controls was enhanced with IL-15 (13.0±1.0% vs. 7.2±1.5%, p = 0.021), but not in SLE patients (7.6±1.6% vs. 7.9±1.4%, p = 0.723). The gene discussed is KIR3DL2; the disease is systemic lupus erythematosus.