Figure 1
From: Molecular and phylogenetic analyses of a new Amphotropic murine leukemia virus (MuLV-1313)
Chicken and rat embryo cell cultures infected with MuLV-1313 pseudotypes of RSV/ src genome. Panel A- Uninfected chicken embryo C/O cells ; Panel B- a culture of same chicken cells as in A, infected with MuLV-1313 pseudotypes of the Rous Sacoma virus (RSV) associated src genome ; Panel C- uninfected Fischer rat embryo fibroblasts and Panel D- same rat embryo cells infected with MuLV-1313 pseudotypes of RSV/src genome. Note the classical rounded cell morphology of the RSV- transformed cells. The virus infected cultures produced excess helper virus (MuLV-1313) as detected by the presence of reverse transcriptase activity in the culture fluid.