Gammaretrovirus |
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| Gammaretroviruses; Murine Tumor Viruses; Viper retroviruses; retrovirus, Viper | |
| A genus of RETROVIRIDAE comprising endogenous sequences in mammals, related RETICULOENDOTHELIOSIS VIRUSES, AVIAN, and a reptilian virus. Many species contain oncogenes and cause leukemias and sarcomas. | |