Editing Enkephalin (section)

==Endogenous opioid peptides==
There are three well-characterized families of [[Opioid peptide#Opioid peptides produced by the body|opioid peptides produced by the body]]: enkephalins, [[β-endorphin]], and [[dynorphins]]. The met-enkephalin peptide sequence is coded for by the enkephalin gene; the leu-enkephalin peptide sequence is coded for by both the enkephalin gene and the dynorphin gene.<ref>[http://drugabuse.gov/pdf/monographs/70.pdf Opioid peptides: Molecular pharmacology, biosynthesis and analysis] {{Webarchive|url=https://web.archive.org/web/20090826150330/http://drugabuse.gov/pdf/monographs/70.pdf |date=2009-08-26 }}, R.S. Rapaka and R. L. Hawks (editors) in a [[National Institute on Drug Abuse]] Research Monograph (#70), 1986.</ref> The proopiomelanocortin gene ([[POMC]]) also contains the met-enkephalin sequence on the N-terminus of beta-endorphin, but the endorphin peptide is not  processed into enkephalin.{{cn|date=July 2024}}