Synthetic peptide fragments
TB-500 research peptide
TB-500 is a synthetic, N-acetylated heptapeptide that corresponds to the actin-binding region of thymosin beta-4, a 43-residue protein found in most mammalian cells. The fragment is used in research to study the actin-binding motif independently of the full-length protein.
For in-vitro laboratory research only. Not for human or veterinary use.
Specifications
- Compound
- TB-500
- Also known as
- Thymosin beta-4 fragment (17-23); Ac-LKKTETQ
- Class
- Synthetic peptide fragments
- Length
- 7 amino acids (N-acetylated)
- Sequence
Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln- Molecular formula
- C38H68N10O14
- Molecular weight
- 889.0 g/mol
- Form
- Lyophilized powder, sealed vial
- Vial sizes
- 10mg
- Purity release standard
- ≥ 99.0% by HPLC-UV, identity by LC-MS
- Storage
- −20 °C, dry, protected from light
- PubChem
- CID 62707662
Lot release testing
Each TB-500 lot is released only after it passes every assay below. Lots under 99.0% purity do not ship.
| Assay | Method | Release criterion |
|---|---|---|
| Purity | HPLC-UV | ≥ 99.0% |
| Net peptide content | Quantitative HPLC | ≥ 100% of label |
| Identity | LC-MS | Matches theoretical mass |
| Appearance | Visual | White lyophilized cake |
| Fentanyl screen | LC-MS/MS | Not detected |
| Heavy metals | ICP-MS | Within specification |
| Sterility | PCR | Not detected |
| Endotoxin | LAL | Within specification |
Frequently asked questions
What is TB-500?
TB-500 is a synthetic, N-acetylated heptapeptide that corresponds to the actin-binding region of thymosin beta-4, a 43-residue protein found in most mammalian cells. The fragment is used in research to study the actin-binding motif independently of the full-length protein.
How is each TB-500 lot tested?
Every lot is tested at an ISO/IEC 17025 accredited third-party laboratory against an eight-assay panel: HPLC-UV purity, quantitative net peptide content, LC-MS identity, appearance, a fentanyl screen, heavy metals by ICP-MS, sterility by PCR, and endotoxin by LAL. The certificate is published before the lot ships.
How do I verify the certificate for my TB-500 vial?
Scan the QR code on the vial label to open the certificate for that exact lot, or search the lot number in the North Wall COA library.
Is TB-500 for human use?
No. North Wall sells this compound solely for in-vitro laboratory research by qualified researchers aged 21 and over. It is not for human or veterinary use, and North Wall does not provide use, preparation, or dosing guidance.
Related reference pages
Synthetic peptide fragmentsBPC-15710mg
BlendsBPC-157 / TB-500 Blend10/10mg
BlendsGHK-Cu / TB-500 / BPC-157 Blend50/10/10mgMolecular data: PubChem CID 62707662. Lot-specific values appear on the certificate for each batch.