FIG. 1.
Viral genome and protein expression. (A) Schematic of the VSV genome, with a diagram indicating the origin of the three VSV M proteins. The M gene encodes the full-length M protein as well as the M2 and M3 proteins, which initiate at the second and third AUG codons in the M mRNA. (B) SDS-PAGE of protein lysates from cells infected with the designated viruses and labeled with [35S]methionine. Positions of VSV and HIV Env proteins are indicated, as are the positions of the internal translational products of M. The gel image was obtained using autoradiography.