How is TB-500 supplied?

TB-500 is supplied as a lyophilised (freeze-dried) powder in 2 mg and 5 mg and 10 mg vials, for laboratory research use only.

Has this batch of TB-500 been independently tested?

Yes. Lot PX-2416-C was tested at 98.9% by an independent laboratory. The full certificate of analysis is published and searchable by lot code on the verify page, before and after purchase.

Is TB-500 for human use?

No. TB-500 is supplied strictly for in vitro laboratory research. It is not for human or animal consumption, and is not a drug, food, or cosmetic.

TB-500

Name: TB-500
Brand: PepNex
Availability: InStock

Thymosin β4 Fragment. Supplied in 2 and 5 and 10 mg vials, lyophilised and ready to reconstitute.

Batch certified

UK stock, same-day

Stored cold, shipped & sealed safely

Strength

How many vials?

2 more vials to save 5%

Add bacteriostatic water

Peptides ship as dry powder — you’ll need this to reconstitute the vial.

£83.05 from free UK delivery

Total£16.95

Ships today

Questions about TB-500? Ask us

For laboratory research use only. Not for human or animal consumption, and not a drug, food, or cosmetic. Sold to qualified researchers and institutions.

About TB-500

Residues: 7
Molecular weight: 889 g/mol
CAS number: 885340-08-9

TB-500 is a synthetic, N-terminally acetylated heptapeptide (Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln) corresponding to the actin-binding motif of thymosin beta-4, a 43-residue endogenous G-actin-sequestering protein. TB-500 is the isolated fragment, not the full thymosin beta-4 protein, and is studied at the molecular level for actin binding and cell-migration pathways.

For laboratory research use only. Not for human or veterinary use.

Specifications

HydrophobicPolarAcidicBasic

7 residues

Identity

Sequence: LKKTETQ
Molecular formula: C38H68N10O14
Molecular weight: 889 g/mol
CAS number: 885340-08-9

Physical

Form: Lyophilised powder
Appearance: White to off-white powder
Solubility: Soluble in bacteriostatic or sterile water
Storage: Store the lyophilised powder at -20°C, protected from light. Refrigerate reconstituted material at 2 to 8°C and use within its stability window.

This batch

Purity: 98.9%
Lot: PX-2416-C
Test date: May 2026
Testing lab: third-party
Methods: HPLC, LC-MS/MS

Certificate

Certificate · lot PX-2416-C98.9% · HPLC / LC-MS/MS · May 2026

COA · PX-2416-C.pdfIndependent lab report

Handling and storage

Reconstitute with bacteriostatic or sterile water. Store the lyophilised powder at -20°C, protected from light; refrigerate reconstituted material at 2 to 8°C. Handle under standard laboratory conditions.

Literature

Thymosin beta4: actin-sequestering protein moonlights to repair injured tissues
Goldstein AL, Hannappel E, Kleinman HK · Trends in Molecular Medicine · 2005

Common questions about TB-500

What is TB-500?: TB-500 is a synthetic, N-terminally acetylated heptapeptide (Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln) corresponding to the actin-binding motif of thymosin beta-4, a 43-residue endogenous G-actin-sequestering protein.
How is TB-500 supplied?: TB-500 is supplied as a lyophilised (freeze-dried) powder in 2 mg and 5 mg and 10 mg vials, for laboratory research use only.
How should TB-500 be stored and handled?: Reconstitute with bacteriostatic or sterile water. Store the lyophilised powder at -20°C, protected from light; refrigerate reconstituted material at 2 to 8°C. Handle under standard laboratory conditions.
Has this batch of TB-500 been independently tested?: Yes. Lot PX-2416-C was tested at 98.9% by an independent laboratory. The full certificate of analysis is published and searchable by lot code on the verify page, before and after purchase.
Is TB-500 for human use?: No. TB-500 is supplied strictly for in vitro laboratory research. It is not for human or animal consumption, and is not a drug, food, or cosmetic.