FIG. 7.

Neutralization of ΔG-gp160G-GFP by HIVIg. Approximately 100 infectious units of ΔG-gp160G-GFP were incubated with HIVIg or normal human serum (NHS) at the indicated dilutions for 15 min at 37°C. Virus was then applied to HeLa-CD4 cells in 96-well plates. After 10 h, GFP-positive cells were counted. Viral infectivity at each antibody dilution is expressed as (number of infected cells per well with antibody/number of infected cells per well without antibody) × 100. Each dilution of antibody was tested in duplicate; error bars represent the range of results between duplicates.