Gammaretrovirus
Virus classification
Group:	Group VI (ssRNA-RT)
Family:	Retroviridae
Subfamily:	Orthoretrovirinae
Genus:	Gammaretrovirus
Type species
Murine leukemia virus
species
Mammalian virus group Feline leukemia virus Gibbon ape leukemia virus Guinea pig type-C oncovirus Porcine type-C oncovirus Xmrv Replication defective viruses Finkel-Biskis-Jinkins murine sarcoma virus Gardner-Arnstein feline sarcoma virus Hardy-Zuckerman feline sarcoma virus Harvey murine sarcoma virus Kirsten murine sarcoma virus Moloney murine sarcoma virus Snyder-Theilen feline sarcoma virus Woolly monkey sarcoma virus Reptilian virus group Viper retrovirus Avian (Reticuloendotheliosis) virus group Chick syncytial virus Reticuloendotheliosis virus Trager duck spleen necrosis virus

A gammaretrovirus is a genus of the retroviridae family. Many species contain oncogenes and cause sarcomas and leukemias.

Examples are the murine leukemia virus, the feline leukemia virus, the feline sarcoma virus, and the avian reticuloendotheliosis viruses.

Many endogenous retroviruses, closely related to exogenous gammaretroviruses are present in the DNA of mammals (including humans), birds, reptiles and amphibians.

Many of the Gammaretroviruses share a conserved RNA structural element called a core encapsidation signal. XMRV is an example of a human gammaretrovirus.[1]

[edit] External links

• Viralzone: Gammaretrovirus
• Chronic Fatigue Syndrom: A Case of Denial (NY Times)

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