CD8A and infection: Since the reduction in the capacity of DCs to activate virus-specific CD8 T cells correlated with the impaired infection of DCs by IgG-opsonized F-MuLV (Figure 2B and Figure 3A), we repeated infection experiments with DCs derived from wt and FcγR-deficient mice using a F-MuLV encoding the fluorescent protein mWasabi (wF-MuLV).