- ≥99% by HPLC; lot-matched COA available
- Lot-matched certificate of analysis
- Ships next business day, tracked
Tissue Repair & Healing Peptides
TB-500 (Thymosin Beta-4 Fragment)
Acetylated LKKTETQ fragment, also known as ABP-7, in research vials
- FormLyophilized powder, sealed glass vial with crimped stopper
- Mol. weight889.02 g/mol
- Research areasCell migration, wound closure, angiogenesis, cardiac and corneal repair models
Supplied for laboratory research use only. Not for human or veterinary use, and not intended to diagnose, treat, cure or prevent any disease.
Overview
TB-500 is the acetylated seven-residue sequence Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln, corresponding to residues 17–23 of thymosin beta-4. The same defined molecule is also cataloged as ABP-7, a name derived from its actin-binding peptide length. ABP-7 is therefore an alias for this existing product—not a separate peptide or additional SKU.
The fragment isolates the LKKTETQ actin-binding motif of the full 43-residue protein. It is supplied as lyophilized powder in 2 mg, 5 mg, 10 mg and 20 mg sealed vials, plus a 10-vial research kit. Each lot is assayed to at least 99% purity by reversed-phase HPLC with mass-based identity confirmation, and a lot-matched certificate of analysis is available.
Specifications
Identity
- CAS number
- 885340-08-9
- Molecular formula
- C38H68N10O14
- Molecular weight
- 889.02 g/mol
- Amino acid sequence
- Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln (thymosin beta-4 residues 17–23)
- Chain length
- 7 amino acids, N-terminally acetylated
- Peptide class
- Thymosin beta-4 fragment; actin-binding domain peptide
Supply & purity
- Form
- Lyophilized powder, sealed glass vial with crimped stopper
- Purity
- ≥99% by HPLC; lot-matched COA available
- Available sizes
- 2 mg, 5 mg, 10 mg, 20 mg; 10-vial kit (10 × 5 mg)
Handling & storage
- Storage (lyophilized)
- −20 °C, sealed and protected from light and moisture
- Storage (reconstituted)
- 2–8 °C, protected from light, used within the study window
Additional detail
- Also known as
- ABP-7, Ac-LKKTETQ, thymosin beta-4 fragment 17–23
- Parent protein
- Thymosin beta-4, a 43-residue G-actin sequestering protein
- Research areas
- Cell migration, wound closure, angiogenesis, cardiac and corneal repair models
Questions about TB-500 (Thymosin Beta-4 Fragment)
What exactly is TB-500?
TB-500 is a synthetic seven-amino-acid peptide with an acetylated N-terminus that reproduces residues 17 to 23 of thymosin beta-4. The exact sequence is Ac-LKKTETQ and is also sold under the alias ABP-7.
Is ABP-7 a different product from TB-500?
No. In this catalog, both names identify the same acetylated seven-residue molecule: Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln. A second ABP-7 product page would duplicate the existing TB-500 SKU and split its search identity.
Is TB-500 the same thing as thymosin beta-4?
No. Thymosin beta-4 is the complete 43-residue protein; TB-500 is a seven-residue fragment of it. The fragment is much smaller, cheaper to synthesise and easier to handle, but it is not chemically identical and studies do not always report identical behaviour between the two.
How is purity verified and is a COA supplied?
Each lot is analysed by reversed-phase HPLC to at least 99% purity, and mass spectrometry confirms the expected molecular mass of 889.02 g/mol. A certificate of analysis matched to the lot number printed on your vial is available on request at any point before or after purchase.
Which vial size should a laboratory choose?
The 5 mg vial suits method development or a single plate-based experiment, 10 mg covers most short in-vivo pilots, and 20 mg is the practical choice for multi-arm or repeated studies where opening several small vials would introduce avoidable handling variability.
How should TB-500 be stored and reconstituted?
Keep the lyophilized powder at −20 °C in the sealed vial. Laboratories generally reconstitute with bacteriostatic or sterile water, swirling rather than shaking, then hold the solution at 2–8 °C protected from light. Aliquot before any freezing step so the material is not repeatedly thawed.
Can TB-500 be used on humans or animals?
No. This product is a research chemical sold for in-vitro and laboratory investigation only. It has no approval as a drug or supplement in any jurisdiction, and we provide no dosing, administration or protocol guidance of any kind with it.
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