Monoclonal antibodies directed against the rev protein of human immunodeficiency virus type 1

Abstract The rev (art/trs) protein of human immunodeficiency virus type 1 (HIV-1), a phospho-protein of 20 K apparent molecular weight, is essential to target the mRNA for virion polypeptides into the cytoplasm. The rev protein was expressed in Escherichia coli as a β-galactosidase fusion protein with a cleavage site for proteinase factor X a . The rev-specific fragment was isolated to immunize mice. Five stable hybridoma cell lines were obtained producing monoclonal antibodies that reacted with rev protein in Western blot and ELISA. Using the monoclonal antibodies in indirect immunofluorescence, the rev protein could be localized in the nucleus, mostly in the nucleoli, of Hela cells that were transfected with a eukaryotic rev expression plasmid.