Vpr is a Human immunodeficieny viral gene and protein product. Vpr stands for `Viral Protein R`. Vpr, a 96 amino acid 14-kDa protein, plays an important role in regulating nuclear import of the HIV-1 pre-integration complex, and is required for virus replication in non-dividing cells such as macrophages. Vpr also induces G2 cell cycle arrest and..
Found on http://en.wikipedia.org/wiki/Vpr
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