FIG. 7.

Slot blot analysis comparing DEN-2 RNA accumulation in FB 9.1 and H 9.1 cells after DEN-2 challenge. Total cellular RNA from each cell line on days 1 to 14 following DEN-2 challenge was blotted and probed for DEN-2 RNA, with a ³²P-labeled probe complementary to the NS2B-NS3 gene region of DEN-2 RNA. (a) RNA from H 9.1 cells. (b) RNA from FB 9.1 cells. (c) Relative amounts of DEN-2 RNA determined by phosphorimager analysis. dpi, days postinfection. *, data from 11-day-postinfection time point for H 9.1 cells were unavailable.