FIG. 2.

Vaccinia virus strain Copenhagen infection inhibits activation of caspase 3. Jurkat cells were either mock infected or infected with vaccinia virus strain Copenhagen at an MOI of 10 and treated with 250 ng of anti-Fas antibody/ml for 2, 4, 6, or 8 h. At the times indicated, cells were permeabilized with digitonin, and caspase 3 processing was monitored by Western blot analysis. (A) Mock-infected Jurkat cells; (B) Jurkat cells infected with vaccinia virus strain Copenhagen.