FIG. 6.

Electrophoretic mobility shift assays with cytoplasmic extracts from infected or uninfected cells. Each reaction mixture contained 2 μg of protein from cytoplasmic extracts made from infected or uninfected HeLa cells, 500 ng of poly(dI-dC) · poly(dI-dC), and early or late oligonucleotide competitor in the amounts indicated below the lanes (in nanograms). The lanes designated with a minus sign show control reactions lacking cytoplasmic extract. The positions of free (F) and bound (B) probes are indicated.