Fig. 3.
Effects of exposure time on the antiviral activity of U18666A. (A) Plaque reduction of FCoV-I KU2 infected fcwf-4 cells pretreated with U18666A at different times. The results are shown as mean ± SE. Data represent four independent experiments. **, p < 0.01 vs pretreated with U18666A for 3 h. (B) Accumulation of intracellular cholesterol in fcwf-4 cells pretreated for the indicated time-points with U18666A.