FIG. 1.

Effect of MCF13 MLV infection on cell growth. (A) Ten thousand CCL64 mink epithelial cells were infected with MCF13 MLV at an MOI of 1 (▴) or 7 (■) or mock infected with medium (○). (B) Mink cells were infected with MCF13 MLV (■) or 4070A amphotropic MLV (⧫) at an MOI of 7 or mock infected (○). Cells were trypsinized at different days after infection, and viable cells were enumerated by trypan blue dye exclusion. Values represent the means and standard deviations calculated from counting duplicate samples from four independent experiments.