FIG. 3.

The expression of LMP1 in v-LMP1-infected MEF cells is stable in the absence of drug selection. The cell lysates were obtained from MEF cells infected with v-LNSX (MEF-Vector) or v-LMP1 (MEF-LMP1) at P3, P11, and P30 following infection with v-LMP; 100 μg of protein was loaded in each lane for Western blot analysis with antibody S12. B95-8 is an EVB-positive cell line, and MOLT-4 is an EBV-negative cell line. Western blotting against β-actin was used as the loading control.