Sable · Question

What is the difference between P21 and TB-500?

P21 is a ciliary neurotrophic factor (CNTF)-derived peptidomimetic with an adamantylglycine, studied in neurogenesis research in rodent models (peptidomimetic, MW about 578.7 g/mol).

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Last verified 2026-10-10

What is the difference between P21 and TB-500?

P21 is a ciliary neurotrophic factor (CNTF)-derived peptidomimetic with an adamantylglycine, studied in neurogenesis research in rodent models (peptidomimetic, MW about 578.7 g/mol).

Which is heavier, P21 or TB-500?

P21 has a molecular weight of about 578.7 g/mol and TB-500 about 889 g/mol (PubChem), so TB-500 is heavier by 310.3 g/mol, a ratio of 1.54. This means 1 mg of P21 contains 1,728 nmol versus 1,124.9 nmol for TB-500.

How many mg of TB-500 are equimolar to 1 mg of P21?

1 mg of P21 (MW 578.7) is 1,728 nmol. The same number of moles of TB-500 (MW 889) weighs 1.536 mg. Equimolar comparisons matter when testing two compounds side by side in the same assay.

Compare the molecular formulas of P21 and TB-500

PubChem lists P21 as C27H42N6O8 (578.7 g/mol) and TB-500 as C38H68N10O14 (889 g/mol). P21 is a peptidomimetic; TB-500 is a peptide. These formulas refer to the parent compounds without salt counter-ions.

A 10 mg vial of P21 equals how many mg of TB-500 in moles?

10 mg of P21 (MW 578.7) is 17.28 µmol. The same amount of TB-500 (MW 889) would weigh 15.362 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 TB-500 in moles?

5 mg of P21 (MW 578.7) is 8.64 µmol. The same amount of TB-500 (MW 889) would weigh 7.681 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 P21 in moles?

10 mg of TB-500 (MW 889) is 11.249 µmol. The same amount of P21 (MW 578.7) would weigh 6.51 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 P21 in moles?

2 mg of TB-500 (MW 889) is 2.25 µmol. The same amount of P21 (MW 578.7) would weigh 1.302 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 P21 in moles?

5 mg of TB-500 (MW 889) is 5.624 µmol. The same amount of P21 (MW 578.7) would weigh 3.255 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 P21 in moles?

15 mg of TB-500 (MW 889) is 16.873 µmol. The same amount of P21 (MW 578.7) would weigh 9.764 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 P21 in moles?

20 mg of TB-500 (MW 889) is 22.497 µmol. The same amount of P21 (MW 578.7) would weigh 13.019 mg. This equimolar conversion lets two compounds be compared at matched molar amounts in the same experiment.

Cite this

Research use only. Not for consumption. No health claims.

Plain

Sable Peptides. (2026). What is the difference between P21 and TB-500?. UK Research Peptide Reference. Retrieved 11 October 2026, from https://www.sablepeptides.co.uk/questions/compare/p21-vs-tb-500/#sqa-041318

APA

Sable Peptides. (2026, October 11). *What is the difference between P21 and TB-500?*. UK Research Peptide Reference. https://www.sablepeptides.co.uk/questions/compare/p21-vs-tb-500/#sqa-041318

BibTeX

@misc{sable_#sqa-041318_2026,
  author = {{Sable Peptides}},
  title = {{What is the difference between P21 and TB-500?}},
  year = {2026},
  howpublished = {\url{https://www.sablepeptides.co.uk/questions/compare/p21-vs-tb-500/#sqa-041318}},
  note = {Accessed 11 October 2026. CC BY 4.0}
}

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Date modified: 2026-10-10