FIG 6.

Evaluation of the counteracting ability of eight FIV Vif proteins against 18 kinds of feline A3Z3 proteins. The experimental setup is the same as that of Fig. 5. FIV infectivity is shown as the percentage of the value without each FIV Vif. “−” or “+” on the x axes represents the absence or presence of the HA-tagged expression plasmid for the feline A3Z3 indicated in each graph. *, P < 0.05 by Student’s t test versus “no Vif.” The assays were independently performed in triplicates, and the averages with SEMs are shown. The FIV Vif isolated from its host species is indicated in bold.