Yet γδTCR involvement in killing of ULBP4-overexpressing murine thymoma EL4 (22) as well as hMSH2-expressing HeLa cells (23) may have been overstated, if the γδTc employed in these studies were as susceptible to B1.1-mediated apoptosis as ours were. The gene discussed is RAET1E; the disease is thymoma.