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  • Title: Purification and sequence of a non-opioid peptide derived from ovine proenkephalin: implications for possible species specific processing.
    Author: Micanovic R, Kruggel W, Ray P, Lewis RV.
    Journal: Peptides; 1984; 5(5):853-6. PubMed ID: 6504720.
    Abstract:
    A non-enkephalin containing pentadeca peptide derived from ovine adrenal proenkephalin has been purified and sequenced. The sequence of the peptide is: Phe-Ala-Glu-Pro-Leu-Pro-Ser-Glu-Glu-Glu-Gly-Glu-Ser-Tyr-Ser (preproenkephalin 237-251) representing the amino portion of peptide B (preproenkephalin 237-268). The sequence is identical to bovine preproenkephalin 237-251, differing from the corresponding human sequence at positions 240 and 244. This peptide can be generated by a processing event common to other opioid peptides and is present in chromaffin granules in significant amounts. The presence of this peptide in substantial quantities suggests a possible difference in proenkephalin processing between the bovine and ovine adrenal medulla.
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