FIG. 3.

Viral DNA in ex vivo T-cell lines from virus-infected monkeys. Tumor cell lines from all virus-infected S. oedipus animals were subjected to genomic viral PCR analysis. The mutation was confirmed in cell lines from animals carrying mutant viruses with a disrupted vil-17 gene. In contrast, the T-cell lines from wild-type (wt) control animals had PCR signals for both virus genes analyzed (vil-17 and vsag). T, cell line from thymus; A, cell line from axillary lymph nodes. The sizes of marker DNA fragments are given on the right.