Sable · Question
What is the difference between SS-31 and Selank?
SS-31 is a mitochondria-targeted tetrapeptide (Szeto-Schiller peptide) that associates with cardiolipin in the inner mitochondrial membrane, studied in mitochondrial bioenergetics research (peptide, MW about 639.8 g/mol).
Research use only. Not for human consumption. No health claims.
Last verified 2026-10-10
What is the difference between SS-31 and Selank?
SS-31 is a mitochondria-targeted tetrapeptide (Szeto-Schiller peptide) that associates with cardiolipin in the inner mitochondrial membrane, studied in mitochondrial bioenergetics research (peptide, MW about 639.8 g/mol).
Which is heavier, SS-31 or Selank?
SS-31 has a molecular weight of about 639.8 g/mol and Selank about 751.9 g/mol (PubChem), so Selank is heavier by 112.1 g/mol, a ratio of 1.18. This means 1 mg of SS-31 contains 1,563 nmol versus 1,330 nmol for Selank.
How many mg of Selank are equimolar to 1 mg of SS-31?
1 mg of SS-31 (MW 639.8) is 1,563 nmol. The same number of moles of Selank (MW 751.9) weighs 1.175 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of SS-31 and Selank
PubChem lists SS-31 as C32H49N9O5 (639.8 g/mol) and Selank as C33H57N11O9 (751.9 g/mol). SS-31 is a peptide; Selank is a peptide. These formulas refer to the parent compounds without salt counter-ions.
A 5 mg vial of SS-31 equals how many mg of Selank in moles?
5 mg of SS-31 (MW 639.8) is 7.815 µmol. The same amount of Selank (MW 751.9) would weigh 5.876 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of SS-31 equals how many mg of Selank in moles?
10 mg of SS-31 (MW 639.8) is 15.63 µmol. The same amount of Selank (MW 751.9) would weigh 11.752 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of Selank equals how many mg of SS-31 in moles?
5 mg of Selank (MW 751.9) is 6.65 µmol. The same amount of SS-31 (MW 639.8) would weigh 4.255 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of Selank equals how many mg of SS-31 in moles?
10 mg of Selank (MW 751.9) is 13.3 µmol. The same amount of SS-31 (MW 639.8) would weigh 8.509 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A CoA for every lot; each vial carries a printed lot number that matches it. Ask with the lot number and we send it.
Cite this
Research use only. Not for consumption. No health claims.
Plain
Sable Peptides. (2026). What is the difference between SS-31 and Selank?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/selank-vs-ss-31/#sqa-040598
APA
Sable Peptides. (2026, October 11). *What is the difference between SS-31 and Selank?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/selank-vs-ss-31/#sqa-040598
BibTeX
@misc{sable_#sqa-040598_2026,
author = {{Sable Peptides}},
title = {{What is the difference between SS-31 and Selank?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/selank-vs-ss-31/#sqa-040598}},
note = {Accessed 11 October 2026. CC BY 4.0}
}Badge
<a href="https://www.sablepeptides.co.uk/ref"><img src="https://www.sablepeptides.co.uk/badge/ref.svg" alt="Data: UK Research Peptide Reference — Sable Peptides" width="220" height="40"></a>
Date modified: 2026-10-10