FIG. 4.

Stochastic expression of IE proteins in ICP0 mutant FXE-infected HFFF-2 cells and of early proteins in dl1403-infected HFFF-2 cells. In all cases the cells were fixed 24 h after infection. Each pair of panels (A and B, C and D, etc.) shows a single nonproductively infected cell stained for the indicated pairs of viral proteins. Panels A to L show FXE-infected cells, with all images captured under very similar scanning conditions. Panels M to R show dl1403-infected cells, also captured under very similar scanning conditions. The panels have been reproduced without further modification of brightness or contrast.