FIG. 4.
Effect of HSV-1 infection on DEVDase activity of infected cells. Replicate 25-cm2 flask cultures of HEp-2 cells were either mock infected or infected with d120 and, where indicated, coinfected with Bac-US3 or Bac-US5 recombinant baculovirus. Cultures were harvested at 18 h after infection and assayed for DEVDase activity colorimetrically at 405 nm as described in Materials and Methods. The results are expressed as fold increase in activity over that of mock-infected cells.