Abstract
Summary
1. Eleven experiments are described in which fibroma was transformed into myxoma virus in cultures of rabbit tissues, both of testes and of kidneys. 2. The transforming agent (TAM) was myxoma virus inactivated by heating at 65–67°C. 3. Live fibroma virus and TAM were inoculated into tissue cultures simultaneously and TAM was re-added at times of fluid change. 4. A good growth of supporting cells appeared essential to successful transformations.
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