One-step growth analyses. Vero, Vero-UL11(HSV-1), RK13, and RK13-UL11(PrV) cells were infected with HSV-1 KOS, HSV-1ΔgM, HSV-1ΔUL11, and HSV-1ΔUL11/gM at an MOI of 5, harvested at the indicated times after infection, and titrated on Vero cells. Average titers and standard deviations from three independent experiments are shown.