Sable · Question
What is the difference between LL-37 and TB-500?
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 TB-500?
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 TB-500?
LL-37 has a molecular weight of about 4493 g/mol and TB-500 about 889 g/mol (PubChem), so LL-37 is heavier by 3,604 g/mol, a ratio of 5.05. This means 1 mg of LL-37 contains 222.6 nmol versus 1,124.9 nmol for TB-500.
How many mg of TB-500 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 TB-500 (MW 889) weighs 0.1979 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of LL-37 and TB-500
PubChem lists LL-37 as C205H340N60O53 (4493 g/mol) and TB-500 as C38H68N10O14 (889 g/mol). LL-37 is a peptide; TB-500 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 TB-500 in moles?
10 mg of LL-37 (MW 4493) is 2.226 µmol. The same amount of TB-500 (MW 889) would weigh 1.979 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 TB-500 in moles?
5 mg of LL-37 (MW 4493) is 1.113 µmol. The same amount of TB-500 (MW 889) would weigh 0.9893 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of TB-500 equals how many mg of LL-37 in moles?
10 mg of TB-500 (MW 889) is 11.249 µmol. The same amount of LL-37 (MW 4493) would weigh 50.54 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 2 mg vial of TB-500 equals how many mg of LL-37 in moles?
2 mg of TB-500 (MW 889) is 2.25 µmol. The same amount of LL-37 (MW 4493) would weigh 10.108 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of TB-500 equals how many mg of LL-37 in moles?
5 mg of TB-500 (MW 889) is 5.624 µmol. The same amount of LL-37 (MW 4493) would weigh 25.27 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 15 mg vial of TB-500 equals how many mg of LL-37 in moles?
15 mg of TB-500 (MW 889) is 16.873 µmol. The same amount of LL-37 (MW 4493) would weigh 75.81 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 20 mg vial of TB-500 equals how many mg of LL-37 in moles?
20 mg of TB-500 (MW 889) is 22.497 µmol. The same amount of LL-37 (MW 4493) would weigh 101.1 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 TB-500?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/ll-37-vs-tb-500/#sqa-039950
APA
Sable Peptides. (2026, October 11). *What is the difference between LL-37 and TB-500?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/ll-37-vs-tb-500/#sqa-039950
BibTeX
@misc{sable_#sqa-039950_2026,
author = {{Sable Peptides}},
title = {{What is the difference between LL-37 and TB-500?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/ll-37-vs-tb-500/#sqa-039950}},
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