FIG. 6.

Sequence analysis of RT-PCR products from mutant and wild-type virions at day 24. Cells were transfected and cultured as for Fig. 5. Culture medium was harvested on day 24 posttransfection, virions were pelleted, and the extracted RNA was subjected to RT-PCR amplification. The resulting product was excised from a gel and sequenced directly. Wild-type T residues are denoted by the arrowheads, and mutant G residues are denoted by the circles.