FIG. 2.
Virus titers in cells infected with rJ2.2 expressing mutated SARS-CoV protein 6. (A to C) 17Cl-1 cells were infected (multiplicity of infection, 1.0) in triplicate with (A) rJ2.2, J2.2.6 or J2.2.6KO, or (B) J2.2, rJ2.2.6Δ3-10, rJ2.2.6Δ11-18, or rJ2.2.6Δ3-18 or (C) J2.2, rJ2.2.60(DxE), or rJ2.2.61(DxE). (D and E) L929 cells were infected with (D) rJ2.2.6, rJ2.2.6KO, rJ2.2.6Δ3-10, rJ2.2.6Δ11-18 or rJ2.2.6Δ3-18 or (E) rJ2.2.6, rJ2.2.6KO, rJ2.2.60(DxE), and rJ2.2.61(DxE). Cells were harvested at the indicated times, and viral titers were determined by plaque assay on HeLa-MHVR cells. Error bars are included but are too small to be visible.