The human immunodeficiency virus type 1-specific protein vpu is required for efficient virus maturation and release.

Abstract excerpt

A deletion mutation affecting vpu was introduced into an infectious molecular clone of human immunodeficiency virus type 1, and the resultant phenotype was examined after infection of human T lymphocytes. The absence of vpu resulted in an accumulation of cell-associated viral proteins and impaired the release of progeny virions. Both electron microscopic and biochemical analyses indicated that a large proportion...

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