Abstract
Studies have been made on the opioid peptides--enkephalins their fragments, and alpha- and gamma-endorphins with concentrations of 10(-8)-10(-4) M, on acetylcholinesterase of human blood erythrocytes. It was found out that these peptides, which were fragments of one propeptide beta-LPH were reversible effectors of acetylcholinesterase. Enkephalins and a number of their fragments were noncompetitive inhibitors. It was shown that natural pentapeptide has the highest inhibitor activity; decreasing of inhibitor activity or the absence of it was a result of pentapeptide molecules degradation. Short endorphins were noncompetitive activators of acetylcholinesterase.
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