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Melanotan II vs PT-141
PT-141 and Melanotan II share the same cyclic seven-residue sequence. As listed, they differ only at the C-terminus: Melanotan II ends in an amide (-NH2) and PT-141 in a free acid (-OH).
| Melanotan II | PT-141 | |
|---|---|---|
| Also known as | Melanotan II, MT-II | Bremelanotide |
| Compound type | Heptapeptide · 7 aa | Heptapeptide · 7 aa |
| Sequence | Ac-Nle-Asp-His-D-Phe-Arg-Trp-Lys-NH2 | Ac-Nle-Asp-His-D-Phe-Arg-Trp-Lys-OH |
| Molecular formula | C50H69N15O9 | C50H68N14O10 |
| Molecular weight | 1024.2 g/mol | 1025.2 g/mol |
| CAS number | 121062-08-6 | 189691-06-3 |
| PubChem CID | — | — |
| Form | Lyophilized powder | Lyophilized powder |
| Sizes | 10 mg | 10 mg |
| Price | from $39.00 | from $49.00 |
| Lab report | Not yet (supplier's spec) | Not yet (supplier's spec) |
Where they differ
- Both have 7 residues.
- The residue sequences are identical.
- The C-terminus is an amide (-NH2) in Melanotan II and a free acid (-OH) in PT-141.
- Molecular formulas: Melanotan II C50H69N15O9, PT-141 C50H68N14O10.
- Molecular weights: Melanotan II 1024.2 g/mol, PT-141 1025.2 g/mol.
Melanotan II
Heptapeptide · 7 aa
10 mg
$39.00
$3.90/mg
Ships in 5–7 days
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PT-141
Heptapeptide · 7 aa
10 mg
$49.00
$4.90/mg
Ships in 5–7 days
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