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  • Title: Amino acid sequence of homologous rat atrial peptides: natriuretic activity of native and synthetic forms.
    Author: Seidah NG, Lazure C, Chrétien M, Thibault G, Garcia R, Cantin M, Genest J, Nutt RF, Brady SF, Lyle TA.
    Journal: Proc Natl Acad Sci U S A; 1984 May; 81(9):2640-4. PubMed ID: 6232612.
    Abstract:
    A substance called atrial natriuretic factor (ANF), localized in secretory granules of atrial cardiocytes, was isolated as four homologous natriuretic peptides from homogenates of rat atria. The complete sequence of the longest form showed that it is composed of 33 amino acids. The three other shorter forms (2-33, 3-33, and 8-33) represent amino-terminally truncated versions of the 33 amino acid parent molecule as shown by analysis of sequence, amino acid composition, or both. The proposed primary structure agrees entirely with the amino acid composition and reveals no significant sequence homology with any known protein or segment of protein. The short form ANF-(8-33) was synthesized by a multi-fragment condensation approach and the synthetic product was shown to exhibit specific activity comparable to that of the natural ANF-(3-33).
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