Previously a genus of the family RETROVIRIDAE consisting of oncogenic exogenous retroviruses that contain type D particles. It included the MASON-PFIZER MONKEY VIRUS. Now it represents one of the two kinds of viruses in the genus BETARETROVIRUS. The core of the type D viruses is the intracytoplasmic type A particle and its mechanism of budding from the cell membrane is similar to the type B oncoviruses.

A genus of the family RETROVIRIDAE consisting of viruses with either type B or type D morphology. This includes a few exogenous, vertically transmitted and endogenous viruses of mice (type B) and some primate and sheep viruses (type D). MAMMARY TUMOR VIRUS, MOUSE is the type species.

Previously a genus of the family RETROVIRIDAE consisting primarily of a few exogenous, vertically transmitted and endogenous viruses of mice. Now it represents one of the two kinds of viruses in the genus BETARETROVIRUS.

Synonyms: Type D Oncornavirus, Oncornavirus, Type D, Oncoviruses Type B, Mammalian, Retroviruses, Type D, Type B Oncoviruses, Mammalian, Betaretrovirus, Betaretroviruses, Mammalian Type B Retroviruses, Oncovirus, Type D, Oncovirus, Type B, Type B Retroviruses, Mammalian, Type D Oncovirus, Type D Retrovirus, Type B, Oncoviruses, Oncoviruses, Type D, txid140052, Type B Oncovirus, Oncoviruses, Type B, Type D Retroviruses, Fibroblast Virus, Human, Permanent, Type D Oncornaviruses, Type D Oncoviruses, Oncoviruses Type B, Retroviruses Type B, Mammalian, Oncornaviruses, Type D, Type B Oncoviruses, Retroviruses Type D, Retrovirus, Type D