Exposure of hamster cells to large doses of polyoma virus is known to result in permanent transformation of a small proportion of cells. Experiments with cells in suspension now suggest that a much ...
THE Tsa mutant of polyoma virus (PyTsa) is a conditional lethal mutant isolated by Fried 1. PyTsa grows normally at the permissive temperature (31.5° C), but at the non-permissive temperature (38.5° C ...
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