FIG. 7.

MHC class I expression is not down regulated on plasma cells replicating EBV. Plasma cells were purified as described in the legend to Fig. 2. The cells were then stained for expression of MHC class I molecules and separated into low and high expressers as shown. The two populations were then subjected to RT-PCR to detect expression of the viral BZLF1 gene as described in the legend to Fig. 3.