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  • Title: The sequence of porcine chromogranin A messenger RNA demonstrates chromogranin A can serve as the precursor for the biologically active hormone, pancreastatin.
    Author: Iacangelo AL, Fischer-Colbrie R, Koller KJ, Brownstein MJ, Eiden LE.
    Journal: Endocrinology; 1988 May; 122(5):2339-41. PubMed ID: 2834189.
    Abstract:
    Specific oligonucleotide priming of double-stranded DNA has been employed to sequence a porcine chromogranin A adrenomedullary cDNA. Porcine chromogranin A is more than 80% identical to human, bovine, and rat chromogranin A at its deduced N- and C-termini. A 49-amino acid region of the porcine molecule is 59-71% homologous to corresponding areas of rat, bovine, and human chromogranin A, and identical to the amino acid sequence of porcine pancreastatin. The sequence is preceded by an arginine at the N-terminus and followed by a GKR sequence at the C-terminus. Thus, porcine chromogranin A can serve as the precursor for pancreastatin, a polypeptide capable of inhibiting insulin release from the endocrine pancreas and acid secretion from parietal cells of the gut.
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