Sable · Question
What is the difference between LL-37 and Selank?
LL-37 is the 37-residue active fragment of the human cathelicidin hCAP18, studied in antimicrobial-peptide and innate-immunity research (peptide, MW about 4493 g/mol).
Research use only. Not for human consumption. No health claims.
Last verified 2026-10-10
What is the difference between LL-37 and Selank?
LL-37 is the 37-residue active fragment of the human cathelicidin hCAP18, studied in antimicrobial-peptide and innate-immunity research (peptide, MW about 4493 g/mol).
Which is heavier, LL-37 or Selank?
LL-37 has a molecular weight of about 4493 g/mol and Selank about 751.9 g/mol (PubChem), so LL-37 is heavier by 3,741.1 g/mol, a ratio of 5.98. This means 1 mg of LL-37 contains 222.6 nmol versus 1,330 nmol for Selank.
How many mg of Selank are equimolar to 1 mg of LL-37?
1 mg of LL-37 (MW 4493) is 222.6 nmol. The same number of moles of Selank (MW 751.9) weighs 0.1673 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of LL-37 and Selank
PubChem lists LL-37 as C205H340N60O53 (4493 g/mol) and Selank as C33H57N11O9 (751.9 g/mol). LL-37 is a peptide; Selank is a peptide. These formulas refer to the parent compounds without salt counter-ions.
A 10 mg vial of LL-37 equals how many mg of Selank in moles?
10 mg of LL-37 (MW 4493) is 2.226 µmol. The same amount of Selank (MW 751.9) would weigh 1.673 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of LL-37 equals how many mg of Selank in moles?
5 mg of LL-37 (MW 4493) is 1.113 µmol. The same amount of Selank (MW 751.9) would weigh 0.8367 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 LL-37 in moles?
5 mg of Selank (MW 751.9) is 6.65 µmol. The same amount of LL-37 (MW 4493) would weigh 29.878 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 LL-37 in moles?
10 mg of Selank (MW 751.9) is 13.3 µmol. The same amount of LL-37 (MW 4493) would weigh 59.755 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 LL-37 and Selank?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/ll-37-vs-selank/#sqa-039886
APA
Sable Peptides. (2026, October 11). *What is the difference between LL-37 and Selank?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/ll-37-vs-selank/#sqa-039886
BibTeX
@misc{sable_#sqa-039886_2026,
author = {{Sable Peptides}},
title = {{What is the difference between LL-37 and Selank?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/ll-37-vs-selank/#sqa-039886}},
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