Is TB-500 the same sequence as thymosin alpha-1?

No. Thymosin alpha-1 is a 28-residue thymic peptide. TB-500 is named here as a thymosin beta-4 fragment. Confirm the mass on the lot report rather than equating the names.

Glossary · 2026-09-24

Scientific lead: Alice Kay, Ph.D.

Thymosin peptides, laboratory definition

Thymosin is a family name, not a single catalog SKU. Thymosin alpha-1 is a 28-residue thymic peptide with its own research note and its own 10 mg vial. TB-500 on this site is named as a thymosin beta-4 fragment used in actin-binding and cell-migration models, with its own 10 mg vial. A family name on a purchasing form is incomplete until the sequence and the SKU are written down.

The TB-500 guide is What is TB-500?. The alpha-1 guide is thymosin alpha-1. As of the September 20, 2026 library review, the TB-500-only SKU did not have its own certificate anchor. The 5 mg/5 mg blend did. Do not substitute one PDF for the other. BPC-157 is a gastric pentadecapeptide, not a thymosin.

Frequently asked questions

Is TB-500 the same sequence as thymosin alpha-1?: No. Thymosin alpha-1 is a 28-residue thymic peptide. TB-500 is named here as a thymosin beta-4 fragment. Confirm the mass on the lot report rather than equating the names.

Research-use only. BlueNex Labs does not provide medical or veterinary advice. Confirm your institution’s policies before purchase.