Sable · Question
What is the difference between Selank and Semax?
Selank is a synthetic heptapeptide analogue of tuftsin extended with Pro-Gly-Pro, developed at the Institute of Molecular Genetics in Russia and studied in neuropeptide research (peptide, MW about 751.9 g/mol).
Research use only. Not for human consumption. No health claims.
Last verified 2026-10-10
What is the difference between Selank and Semax?
Selank is a synthetic heptapeptide analogue of tuftsin extended with Pro-Gly-Pro, developed at the Institute of Molecular Genetics in Russia and studied in neuropeptide research (peptide, MW about 751.9 g/mol).
Which is heavier, Selank or Semax?
Selank has a molecular weight of about 751.9 g/mol and Semax about 813.9 g/mol (PubChem), so Semax is heavier by 62 g/mol, a ratio of 1.08. This means 1 mg of Selank contains 1,330 nmol versus 1,228.7 nmol for Semax.
How many mg of Semax are equimolar to 1 mg of Selank?
1 mg of Selank (MW 751.9) is 1,330 nmol. The same number of moles of Semax (MW 813.9) weighs 1.082 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of Selank and Semax
PubChem lists Selank as C33H57N11O9 (751.9 g/mol) and Semax as C37H51N9O10S (813.9 g/mol). Selank is a peptide; Semax is a peptide. These formulas refer to the parent compounds without salt counter-ions.
A 5 mg vial of Selank equals how many mg of Semax in moles?
5 mg of Selank (MW 751.9) is 6.65 µmol. The same amount of Semax (MW 813.9) would weigh 5.412 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 Semax in moles?
10 mg of Selank (MW 751.9) is 13.3 µmol. The same amount of Semax (MW 813.9) would weigh 10.825 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of Semax equals how many mg of Selank in moles?
5 mg of Semax (MW 813.9) is 6.143 µmol. The same amount of Selank (MW 751.9) would weigh 4.619 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of Semax equals how many mg of Selank in moles?
10 mg of Semax (MW 813.9) is 12.287 µmol. The same amount of Selank (MW 751.9) would weigh 9.238 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 30 mg vial of Semax equals how many mg of Selank in moles?
30 mg of Semax (MW 813.9) is 36.86 µmol. The same amount of Selank (MW 751.9) would weigh 27.715 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 Selank and Semax?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/selank-vs-semax/#sqa-040677
APA
Sable Peptides. (2026, October 11). *What is the difference between Selank and Semax?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/selank-vs-semax/#sqa-040677
BibTeX
@misc{sable_#sqa-040677_2026,
author = {{Sable Peptides}},
title = {{What is the difference between Selank and Semax?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/selank-vs-semax/#sqa-040677}},
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