Figure 4
From: Assessment of HIV-1 entry inhibitors by MLV/HIV-1 pseudotyped vectors

Incorporation of HIV-1 Env into vector particles. Incorporation of Env into MLV/HIV-1 particles was analyzed by Western blot analysis of particles concentrated from FLY cell supernatants by ultracentrifugation. Equal loading was confirmed after stripping the blot and incubating with an anti-MLV-Gag (p30) antibody.