Analysis of an Inhibin Preparation Reveals Apparent Identity Between a Peptide with Inhibin-like Activity and a Sperm-coating Antigen
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The amino acid sequence of a large form of inhibin-like peptide in human seminal plasma was determined, and compared with structures reported for similar inhibin preparations and a seminal plasma globulin. The data confirm and correlate previous reports on this form of inhibin-like peptide. The structural comparisons further suggest that the peptide is closely similar to or possibly identical to a sperm-coating antigen reported to be synthesized from prostatic epithelium. This may correlate with non-gonadal origins of inhibin-like material and will help to elucidate the biological roles of inhibin(s).
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