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Melanotan I vs Melanotan II
Melanotan I is a linear 13-residue α-MSH analogue ([Nle4, D-Phe7]-α-MSH). Melanotan II is a shorter, cyclic 7-residue analogue.
| Melanotan I | Melanotan II | |
|---|---|---|
| Also known as | Afamelanotide, MT-I, [Nle4, D-Phe7]-α-MSH | Melanotan II, MT-II |
| Compound type | Peptide · 13 aa | Heptapeptide · 7 aa |
| Sequence | Ac-Ser-Tyr-Ser-Nle-Glu-His-D-Phe-Arg-Trp-Gly-Lys-Pro-Val-NH2 | Ac-Nle-Asp-His-D-Phe-Arg-Trp-Lys-NH2 |
| Molecular formula | C78H111N21O19 | C50H69N15O9 |
| Molecular weight | 1646.9 g/mol | 1024.2 g/mol |
| CAS number | 75921-69-6 | 121062-08-6 |
| PubChem CID | — | — |
| Form | Lyophilized powder | Lyophilized powder |
| Sizes | 10 mg | 10 mg |
| Price | from $39.00 | from $39.00 |
| Lab report | Not yet (supplier's spec) | Not yet (supplier's spec) |
Where they differ
- Melanotan I has 13 residues and Melanotan II has 7.
- Molecular formulas: Melanotan I C78H111N21O19, Melanotan II C50H69N15O9.
- Molecular weights: Melanotan I 1646.9 g/mol, Melanotan II 1024.2 g/mol.
Melanotan I
Peptide · 13 aa
10 mg
$39.00
$3.90/mg
Ships in 5–7 days
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Melanotan II
Heptapeptide · 7 aa
10 mg
$39.00
$3.90/mg
Ships in 5–7 days
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