NK cells from MM patients displayed increased expression of multiple activating receptors, including 2B4, NKp46, NKp44, NKp30, NKG2D, and DNAM-1, and were efficiently cytotoxic to K562 cells and primary autologous MM cells, but not to autologous CD34+ cells (71). The gene discussed is NCR1; the disease is Miyoshi myopathy.