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FEBS Lett. 1986 Feb 17;196(2):223-7.

Chemical characterization and opioid activity of an exorphin isolated from in vivo digests of casein.

Abstract

The in vivo formation of an opioid peptide (exorphin) derived from beta-casein has been proved for the first time. It was isolated from duodenal chyme of minipigs after feeding with the milk protein casein. The exorphin has been identified as a beta-casein fragment by end-group determinations and qualitative amino acid analysis of the purified peptide. This peptide, named beta-casomorphin-11, displayed substantial opioid activity in an opiate receptor-binding assay.

PMID:
3512294
[Indexed for MEDLINE]
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