Specification
Side by side
| PT-141 | Selank | |
|---|---|---|
| Class | Synthetic cyclic heptapeptide melanocortin analog | Synthetic tuftsin analog |
| Residues | 7 | 7 |
| Sizes | 10 mg | 10 mg |
Origin and target
Where each one comes from, and what it binds
PT-141
Origin. A synthetic cyclic heptapeptide, a metabolite of the melanocortin analog melanotan II, also known as bremelanotide.
Target. The melanocortin receptor family.
Full referenceSelank
Origin. A synthetic analog of tuftsin, a naturally occurring tetrapeptide, extended with a proline-glycine-proline tail.
Target. Built on the tuftsin sequence with the same C-terminal stabilizing extension used in Semax.
Full referenceRead next
Each one on its own page
Handling
The same for both
Both ship as freeze-dried powder, both mix with bacteriostatic water the same way, and both are stored at minus 20 C out of the light until then. What differs is which breakdown route each sequence is prone to, and the stability guide shows how to read that from the amino acids.
More comparisons
Others in signalling peptides
Documentation
Both tested, both certificates published
Whichever you order, the latest lab certificate is on its product page.