Sarcoma Viruses, Murine

**Definition:** 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).

**Tree numbers:** - B04.265.600 - B04.613.807.375.860 - B04.820.650.375.860

**Synonyms:** - Mouse Sarcoma Viruses