FIG. 3.

Growth properties of WT and LR mutant viruses in MDBK cells. Growth curves were performed as described in Materials and Methods. (A) Cells were infected at an MOI of 1. LR mutant virus is denoted by open symbols, and WT virus is denoted by solid symbols. Released virus is denoted by ovals, and cell-associated virus is denoted by rectangles. There were no significant differences between the growth curves or final titers of WT and the LR mutant virus. (B) Cells were infected at an MOI of 5. Solid ovals denote WT virus titers, and open ovals denote LR mutant virus titers. The results are representative of four different experiments.