Biochemical and pharmacological studies of the metabolism of dynorphin 1-8 by Diane M. Dixon

“…Pre-treatment of the metabolizing tissue with a standard cocktail of enzyme inhibitors decreased the degradation of [3H]dynorphin 1-8 at both the N- and C-termini. However, inclusion of this enzyme inhibitor cocktail revealed the activity of a further enzyme, an endopeptidase, capable of cleaving the leucine5–arginine6 bond within the octapeptide liberating the opioid pentapeptide [Leu]enkephalin. …”
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