LMP2A expression in CB-LCLs. (A) LMP2A protein expression was determined by Western blot analysis. The peripheral blood B-cell–derived LCL 970402 and LCL 940410 were used as positive controls. The protein lysate of the EBV-negative cell line BL41 was blotted as a negative control. All LCLs analyzed were consistently positive for LMP2A. (B) β-actin was used as a loading control.