A synthetic protein corresponding to the entire vpr gene product from the human immunodeficiency virus HIV‐1 is recognized by antibodies from HIV‐infected patients

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Abstract
The 95 amino acid-protein encoded by the non-structural vpr gene of the human immunodeficiency virus type 1(LAV-1BRU isolate) was chemically synthesized by solid phase methodology. The synthetic vpr protein was characterized by amino acid analysis, sequence analysis, RP-HPLC, and urea-SDS PAGE. Using a radioimmunoassay, antibodies to the synthetic protein was detected in sera of 25% of HIV 1-seropositive patients tested. Western blot analysis suggested that the antibodies preferentially recognized the dimeric form of vpr.