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    Can J Biochem. 1977 Jun;55(6):666-70.

    Primary structure and morphine-like activity of human beta-endorphin.

    Abstract

    The complete amino acid sequence of human beta-endorphin was obtained by automatic sequencing of a sulfonyl isothiocyanate derivative of this peptide, in combination with peptide mapping of a tryptic digest of the native molecule. It was found to be identical with the carboxy-terminal portion 61-91 of human beta-lipotropin (beta-LPH). The morphine-like activity of beta-endorphin is comparable both in the mouse vas deferens bioassay and in the opiate receptor binding assay. However, beta-LPH is not active up to concentrations of 10(-6) M.

    PMID:
    195688
    [PubMed - indexed for MEDLINE]

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