Figure 2. Deletion of Rh158–180 restores MHC-I expression during RhCMV infection.

A) Diagram of the step-wise construction of the ΔRhUS2-11 and Δ158–180,ΔRhUS2-11 viruses. Using the RhCMV BAC the RhUS2-11 region was replaced with a PCR-fragment containing a Kanamycin resistance (Kan^r) cassette flanked by RhCMV homologous regions. The Kan^r cassette was removed by arabinose-induced FLP recombinase prior to replacing the Rh158-180 region with Kan^r. B) Pulse-chase labeling for 10 min of TRFs infected with WT or recombinant RhCMV followed by IP of total MHC-I. In C) 50 µM MG132 or DMSO was included as in Fig. 1F. (*) indicates a deglycosylated cytosolic degradation intermediate stabilized by MG132.