FIG. 6.

Effects of E protein expression levels in rescue of recombinant viruses rTGEV-(MluI-FseI)-FL and rTGEV- Δ3abΔE. (A and B) Growth kinetics of rTGEV-(MluI-FseI)-FL (A) and rTGEV-Δ3abΔE (B) virus in LLC-PK1 cell lines expressing different levels of E protein (Fig. 5). C, untransformed LLC-PK1 cells; E-1 to E-6, cell lines expressing different amounts of E protein. (C) Relation between virus (rTGEV-Δ3abΔE) titers and E protein expression levels in transformed LLC-PK1 cells. Mean values from four experiments are represented, with standard deviations shown as error bars.