Research Peptide

TB-500 Research Peptide

Name: TB-500 Raw Vial
Brand: PepDirect
SKU: tb-500
Availability: InStock

Lyophilised TB-500 peptide fragment supplied for laboratory research.

CAS 885340-08-9 · LOT TM-2469 · HPLC ≥ 99.5%

§ Amount

§ Price

$47.73

IN STOCK

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§ About TB-500

TB-500 is an acetylated peptide fragment corresponding to residues 17–23 of thymosin beta-4. The fragment contains the LKKTETQ region associated with actin-related research, but it is chemically distinct from the full 43-residue thymosin beta-4 protein.

Research involving full-length thymosin beta-4 should not automatically be represented as evidence for TB-500 itself unless the specific fragment was studied. PepDirect supplies TB-500 exclusively for laboratory research use.

§ TB-500 vs full-length thymosin beta-4

TB-500 is an acetylated 7-residue peptide fragment (N-acetyl-LKKTETQ) corresponding to residues 17–23 of thymosin beta-4. Full-length thymosin beta-4 is a distinct 43-residue protein with a different CAS number, molecular formula and molecular weight. Research findings observed for the full-length protein do not automatically apply to the TB-500 fragment unless the fragment itself was studied.

§ Scientific Specifications

Compound Name: TB-500 (acetylated thymosin beta-4 17–23 fragment)
CAS Number: 885340-08-9
Molecular Formula: C38H68N10O14
Molecular Weight: 889.01 g/mol
Sequence: N-acetyl-Leu-Lys-Lys-Thr-Glu-Thr-Gln
Purity: 99%+ (HPLC verified per lot)
Form: Lyophilised powder
Storage: Store dry, 2°C to 8°C

§ Preclinical & Laboratory Research Context

Actin-binding-region peptide research
Cell-migration-related experimental models
Peptide-fragment biochemical studies
Comparative research versus full-length thymosin beta-4 (evidence for full-length Tβ4 should not be transferred to the TB-500 fragment)

§ Quality & Batch Testing

Each batch of TB-500 is independently tested before it ships. Purity is verified by HPLC (High-Performance Liquid Chromatography) at ≥ 99.5%, and the current lot displayed on this product page (LOT TM-2469) corresponds to the certificate of analysis available under the Lab certificates accordion on this page.

Lot-specific COA documentation is published here before purchase and ships in the box. To confirm a lot after delivery, visit Verify your product.

§ Research References

TB-500 (acetylated Tβ4 17–23 fragment) · CAS 885340-08-9 identity recordFDA GSRS / precisionFDA
Thymosin beta-4 (full-length), actin-sequestering research reviewPubMed · Goldstein et al.
Thymosin β4 fragments and actin-binding researchPubMed · Van Troys et al.

§ FAQ

What is TB-500?: TB-500 is an acetylated peptide fragment corresponding to residues 17–23 of thymosin beta-4 (sequence N-acetyl-LKKTETQ). It contains the LKKTETQ region associated with actin-related research.
Is TB-500 the same as thymosin beta-4?: No. TB-500 is a short 7-residue acetylated fragment; full-length thymosin beta-4 is a 43-residue protein. They are chemically distinct and their research evidence bases should not be conflated.
What is the relationship between TB-500 and thymosin beta-4?: The TB-500 sequence corresponds to residues 17–23 of thymosin beta-4. Research involving the full-length protein does not automatically establish equivalent findings for the fragment unless the fragment itself was studied.
What is the TB-500 peptide sequence?: N-acetyl-Leu-Lys-Lys-Thr-Glu-Thr-Gln (N-acetyl-LKKTETQ).
Is TB-500 the same as BPC-157?: No. TB-500 and BPC-157 are distinct research peptides with different sequences and different research histories. They are frequently discussed together in tissue-repair research but are not interchangeable.
How is PepDirect TB-500 tested?: Every lot is supplied with lot-specific documentation. HPLC purity is reported on the product hero and full identity information is captured in the lot Certificate of Analysis.
How is PepDirect TB-500 tested?: TB-500 is tested by HPLC to a purity of ≥ 99.5%. The current lot displayed on this page is TM-2469. A lot-specific Certificate of Analysis is published on the product page before purchase and ships in the box.
Is this intended for human use?: No. All PepDirect products are sold strictly for laboratory and research use only, and are not intended for human or veterinary use, consumption, or any clinical or diagnostic application.
How quickly does PepDirect ship?: Orders placed before 3:00 PM GMT are dispatched the same business day. Orders placed after 3:00 PM GMT are dispatched the next business day, with tracked delivery in 1-2 business days across the UK and EU. Shipping is calculated and shown at checkout based on destination.
Does PepDirect provide a Certificate of Analysis?: Yes. Every lot's COA is published on the product page before it ships, and the same PDF is included in the box.
What is your guarantee?: Same-day replacement on damaged or lost shipments, or a full refund on request, no questions asked.

§ Intended Use

This product is intended strictly for laboratory research applications by qualified personnel. It is not approved for human or animal consumption, and must not be used in foods, drugs, supplements, cosmetics, or diagnostics.

§ Related Research Compounds

§ Legal Disclaimer

This compound and the statements on this page have not been evaluated by any regulatory body. No claims are made regarding diagnosis, treatment, mitigation, or prevention of any disease. Use is restricted to qualified researchers operating in appropriate laboratory environments.

§ Terms of Sale

By purchasing this product, the buyer confirms they are a qualified researcher or institutional purchaser, and accepts full responsibility for its handling, storage, and lawful use.

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Laboratory preparation supplies

Raw vial research material requires appropriate laboratory preparation equipment. The available kit groups compatible preparation and handling supplies in one bundle.