Sarcoma Viruses, Murine |
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| Murine Sarcoma Viruses; Sarcoma Viruses, Mouse | |
| A group of replication-defective viruses, in the genus GAMMARETROVIRUS, which are capable of transforming cells, but which replicate and produce tumors only in the presence of Murine leukemia viruses (LEUKEMIA VIRUS, MURINE). | |