This structure has been proposed as a fragment derived from collagen, particularly from the alpha 2(I) chain of type I collagen
Agrawal KK, Murti Y, Tangeretin
Eur J Heart Fail 22:196213 Khan MS, Fonarow GC, McGuire DK, Hernandez AF, Vaduganathan M, Rosenstock J, Handelsman Y, Verma S, Anker SD, McMurray JJV, Kosiborod MN, Butler J (2020) Glucagon-Like Peptide 1 Receptor Agonists and Heart Failure: The Need for Further Evidence Generation and Practice Guidelines Optimization
Together, these modifications produce a compound reported to be approximately 26-fold more potent than native -MSH in adenylyl cyclase assay systems, positioning MT1 as a common reference compound in MC1R pharmacology and melanogenesis pathway research
The dosing regimens for these drugs vary dramatically