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Biology of Reproduction, Vol 50, 516-525, Copyright © 1994 by Society for the Study of Reproduction
ARTICLES |
C Osterhoff, C Kirchhoff, N Krull and R Ivell
Department of Molecular Biology, University of Hamburg, Germany.
A novel human cDNA encoding a small secretory glycopeptide specifically expressed within the caput and proximal corpus regions of the human epididymis, HE2, has been cloned and sequenced. Southern hybridization analysis showed it to be derived from a single-copy gene. A subclone containing the coding region of the mature peptide was used to generate the putatively encoded peptide as a 10,000 M(r) recombinant fusion protein in a bacterial expression system. This recombinant HE2 protein, as well as an oligopeptide deduced from the open-reading frame, was used to raise polyclonal antisera. Immunohistochemistry and immunofluorescence showed that the predicted HE2 peptide is present in the epididymal epithelium and on the sperm surface, where it adopts a typical antigenic pattern with a subacrosomal equatorial distribution on the sperm head.
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