endothelin

noun
en·​do·​the·​lin | \ ˌen-dō-ˈthē-lin \

Medical Definition of endothelin

: any of several polypeptides consisting of 21 amino acid residues that are produced in various cells and tissues, that play a role in regulating vasomotor activity, cell proliferation, and the production of hormones, and that have been implicated in the development of vascular disease

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