(A) Example of immunofluorescent staining to detect endogenous CCDC137 and GFP expression in primary macrophages at 48 hr after infection with V1/δ-Vpr (left), V1/HA-Vpr (center) or V1/HA-Vpr (Q65R) (right) at low MOI. Scale bar: 10 μm. Here, CCDC137 is linked to infection.