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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

The sequence of porcine chromogranin A messenger RNA demonstrates chromogranin A can serve as the precursor for the biologically active hormone, pancreastatin.

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.[1]


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