Gammaretrovirus

**Definition:** 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.

**Tree numbers:** - B04.613.807.375 - B04.820.650.375

**Synonyms:** - Mammalian Type C Retroviruses - Type C Retroviruses, Mammalian - Retroviruses Type C, Mammalian