Figure 3.
Schematic structure of Mo-MuLV RNA. The 8.3 kb genomic ssRNA of Mo-MuLV (105) is represented by a double line. The positions of initiation and termination codons are indicated by closed triangles and circles, respectively. The ‘leaky’ UAG codon is boxed. The two primary polypeptides of 65 and 80 kDa are indicated by single lines. The gag/pol readthrough product of 180 kDa is shown as a broken line. This polypeptide is subsequently cleaved into the gag protein, a protease of 13 kDa and the reverse transcriptase of 120 kDa.