FIG. 6.

Effect of chloroquine and ammonium chloride on the infectivity of VSV-GFP and ΔG-gp160G-GFP. HeLa-CD4 cells on 96-well plates were pretreated with either drug for 1 h then infected with either virus for 90 min in the presence of the drug. Cells were then incubated for an additional 5 h with chloroquine (A) or for an additional 2 h with ammonium chloride (B). At 10 h postinfection, GFP-positive cells were counted. Each drug concentration was tested in triplicate; error bars represent one standard deviation.