Sable · Question
What is the difference between Cartalax and P21?
Cartalax is a synthetic tripeptide from the Khavinson short-peptide series studied in cartilage-cell (chondrocyte) culture research (peptide, MW about 333.29 g/mol).
Research use only. Not for human consumption. No health claims.
Last verified 2026-10-10
What is the difference between Cartalax and P21?
Cartalax is a synthetic tripeptide from the Khavinson short-peptide series studied in cartilage-cell (chondrocyte) culture research (peptide, MW about 333.29 g/mol).
Which is heavier, Cartalax or P21?
Cartalax has a molecular weight of about 333.29 g/mol and P21 about 578.7 g/mol (PubChem), so P21 is heavier by 245.4 g/mol, a ratio of 1.74. This means 1 mg of Cartalax contains 3,000.4 nmol versus 1,728 nmol for P21.
How many mg of P21 are equimolar to 1 mg of Cartalax?
1 mg of Cartalax (MW 333.29) is 3,000.4 nmol. The same number of moles of P21 (MW 578.7) weighs 1.736 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.
Compare the molecular formulas of Cartalax and P21
PubChem lists Cartalax as C12H19N3O8 (333.29 g/mol) and P21 as C27H42N6O8 (578.7 g/mol). Cartalax is a peptide; P21 is a peptidomimetic. These formulas refer to the parent compounds without salt counter-ions.
A 10 mg vial of Cartalax equals how many mg of P21 in moles?
10 mg of Cartalax (MW 333.29) is 30.004 µmol. The same amount of P21 (MW 578.7) would weigh 17.363 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 20 mg vial of Cartalax equals how many mg of P21 in moles?
20 mg of Cartalax (MW 333.29) is 60.008 µmol. The same amount of P21 (MW 578.7) would weigh 34.727 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 10 mg vial of P21 equals how many mg of Cartalax in moles?
10 mg of P21 (MW 578.7) is 17.28 µmol. The same amount of Cartalax (MW 333.29) would weigh 5.759 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.
A 5 mg vial of P21 equals how many mg of Cartalax in moles?
5 mg of P21 (MW 578.7) is 8.64 µmol. The same amount of Cartalax (MW 333.29) would weigh 2.88 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 Cartalax and P21?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/cartalax-vs-p21/#sqa-041246
APA
Sable Peptides. (2026, October 11). *What is the difference between Cartalax and P21?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/cartalax-vs-p21/#sqa-041246
BibTeX
@misc{sable_#sqa-041246_2026,
author = {{Sable Peptides}},
title = {{What is the difference between Cartalax and P21?}},
year = {2026},
howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/cartalax-vs-p21/#sqa-041246}},
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