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  • Title: Isolation and characterization of the bovine hypothalamic corticotropin-releasing factor.
    Author: Esch F, Ling N, Bohlen P, Baird A, Benoit R, Guillemin R.
    Journal: Biochem Biophys Res Commun; 1984 Aug 16; 122(3):899-905. PubMed ID: 6332625.
    Abstract:
    A 41 amino acid peptide with high intrinsic corticotropin-releasing activity was isolated from 1000 bovine hypothalami by means of immunoaffinity chromatography, gel filtration, and two steps of reverse phase HPLC. The primary structure of the amino terminal 39 amino acids was characterized by gas phase sequence analysis. The sequence of the amidated carboxyl terminal dipeptide was established by digestion of the intact natural product with Staphylococcus aureus V8 protease, dansylation of the digest and comparative reverse phase liquid chromatography studies with the synthetic dansylated dipeptides Ile-Ala-NH2, Ile-Ala-OH, Ala-Ile-NH2 and Ala-Ile-OH. The complete structure of the bovine corticotropin-releasing factor was established as: Ser-Gln-Glu-Pro-Pro-Ile-Ser-Leu-Asp-Leu-Thr-Phe-His-Leu-Leu-Arg-Glu-Val- Leu- Glu-Met-Thr-Lys-Ala-Asp-Gln-Leu-Ala-Gln-Gln-Ala-His-Asn-Asn-Arg-Lys-Leu- Leu- Asp-Ile-Ala-NH2 using approximately 650 pmol of material.
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