Reference
What is PT-141?
PT-141, also called bremelanotide, is a melanocortin peptide derived directly from Melanotan II. It is a metabolite of that compound, subsequently developed in its own right.
Classification
| Type | Peptide |
| Chain length | 7 amino acid residues |
| Family | Melanocortin analogue |
| Origin | Derived from Melanotan II; also known as bremelanotide |
| Supplied as | Lyophilised powder in a sealed vial |
That lineage is why the two are chemically so close: PT-141 is essentially what Melanotan II becomes after a particular chemical change, isolated and made deliberately rather than left to occur.
Where it sits by length
At 7 residues, PT-141 is a short chain — an oligopeptide by the usual convention. The boundary is a convention, not a rule of chemistry — chains up to roughly fifty residues are generally called peptides.
What this page does not cover
Nothing here describes what PT-141 does, what it is used for, or whether it is safe. We publish analytical results and ship parcels; we give no guidance on dosing, preparation or use, and that applies to our reference pages as much as to the product pages. The person to ask about any of that is a registered prescriber.
Where it came from
PT-141 is not a fresh design. It is what Melanotan II turns into in the body, isolated and developed as a compound of its own.
The late 1990s — New Jersey, United States. When was PT-141 created?
Further reading
Melanotan I vs Melanotan II — the two melanotans, and how PT-141 came out of the second.
More on PT-141
See PT-141 in the range · What is a peptide? · Discovery timeline · All reference
