Fig. 4

Env-mediated HIV-1 infectivity. The pseudoviruses packed with Env recombinants and the parent strains NL4–3 and SG3 were generated and the infectious ability was measured by a single-cycle infection assay. RLU, relative light unit. *, p < 0.05 when compared with NL4–3. #, p < 0.05 when compared with SG3