Endothelin 1, also known as preproendothelin-1, is a potent vasoconstrictor peptide produced by vascular endothelial cells. Wikipedia

Endothelins are peptides with receptors and effects in many body organs. Wikipedia

A peptide playing important role in vascular haemostasis Wikipedia Disambiguation

Mammalian protein found in human, mouse, rat Wikidata

An instance of defined set in Homo sapiens with Reactome ID Wikidata

21-amino acid peptide produced by vascular endothelial cells and functioning as a potent vasoconstrictor Wikidata

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. Wiktionary

A kind of polypeptide. Wiktionary (translation)