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  • Title: Two gonadotropin-releasing hormones from African catfish (Clarias gariepinus).
    Author: Bogerd J, Li KW, Janssen-Dommerholt C, Goos H.
    Journal: Biochem Biophys Res Commun; 1992 Aug 31; 187(1):127-34. PubMed ID: 1520292.
    Abstract:
    Two forms of gonadotropin-releasing hormone (GnRH) have been purified from brain extracts of the African catfish, Clarias gariepinus, using reverse-phase high performance liquid chromatography (HPLC) and radioimmunoassay (RIA). The amino acid sequences of both forms of African catfish GnRH were determined using Edman degradation after digestion with pyroglutamyl aminopeptidase. In addition, both GnRHs were studied by mass spectrometry. The primary structure of African catfish GnRH I is identical to Thai catfish GnRH I, pGlu-His-Trp-Ser-His-Gly-Leu-Asn-Pro-Gly-NH2, and the primary structure of African catfish GnRH II is identical to the widely distributed and highly conserved chicken GnRH II, pGlu-His-Trp-Ser-His-Gly-Trp-Tyr-Pro-Gly-NH2.
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