Identity
- Class
- Hormonal
- Molecular weight
- 1647 Da
- Residues
- 13
- Heavy atoms
- 118
- Reference slug
- melanotan-i
These are published properties of the molecule, given for identification. Values we cannot confirm are omitted rather than estimated. What these terms mean.
What this compound is
Alpha-MSH with two substitutions: the methionine at four becomes norleucine, which cannot oxidise, and the phenylalanine at seven becomes its D form, whose side chain is mirrored here. Two residues are the whole difference.
Sequence
SYSUEHfRWGKPV
This sequence uses notation outside the standard twenty one-letter codes — a lowercase letter marks a D-amino acid, and other symbols mark modified or non-standard residues. It is reproduced exactly as published rather than normalised, and no residue composition is derived from it.
Reference databases
PubChem
Compound record: Afamelanotide
Resolved from the compound name
PubMed
Indexed literature
Live search for Melanotan I
Links resolved against the live databases on 2026-08-29.
Others in Hormonal
Kisspeptin-10
10 residues · 1302 Da
Ten residues, the shortest fragment that retains activity at its receptor. The C-terminal amide…
In our catalogue
Melanotan II
7 residues · 1024 Da
Seven residues closed into a ring by a side-chain lactam: the aspartate at two and the lysine at…
In our catalogue
PT-141
7 residues · 1025 Da
The same ring as Melanotan II, differing only at the C-terminus, which is a free acid here rathe…
In our catalogue
ACTH 1-13
13 residues · 1624 Da
The same thirteen residues as alpha-MSH but without the caps at either end. Putting the two next…
Reference entry
ACTH 1-24
24 residues · 2933 Da
Twenty-four residues, the shortest fragment of corticotropin that keeps full activity at the rec…
Reference entry
Alarelin
9 residues · 1167 Da
Nine residues opening with a pyroglutamate ring and closing with an ethylamide, both drawn. D-al…
Reference entry
This is a reference entry. Sequence, residue count, molecular weight and atom count are published properties of the molecule, given for identification. Nothing on this page describes an application, benefit, dose, route or outcome, and nothing here should be read as an offer to supply or as guidance for use in a person or an animal. Materials sold by PepXtide are for laboratory research use only, are not for human or animal consumption, and have not been evaluated by the FDA.