# TB-500 - TB-500 in plain language: a fragment of the protein thymosin beta-4, what researchers have studied, and the batch details in your account. TB-500 (Ac-LKKTETQ) research-use-only peptide - freeze-dried fragment, current certification unverified, dispatched from Perth. ## At a glance | | | | --- | --- | | Compound | TB-500 | | Descriptor | Thymosin beta-4 fragment peptide | | Current certificate | Not verified for listed lot | | Storage | 2-8 C | | Format | Freeze-dried powder | | Availability | In stock | | Lot | TB5-2506 | ## Sizes and pricing (AUD) | | | | --- | --- | | 10 mg | $109 AUD | ## Certificate status Matching current certificate unavailable. No verified report matches the listed compound, lot and amount. No matching current certificate is displayed for this product. ## What TB-500 is (and isn't) TB-500 is a synthetic seven-amino-acid peptide, Ac-LKKTETQ - the actin-binding fragment of the protein thymosin beta-4 (residues 17-23 of the 43-amino-acid protein). It is not the same as full-length thymosin beta-4. Most of the well-known research is on the whole protein; the direct evidence on the fragment itself is thinner, and mostly in cells and animals. The sequence anchors the published fragment literature. The historical heavy-metals screen does not confirm the current lot's identity, CAS or formula. ## Specifications The practical label details together: 10 mg, lot TB5-2506, 2-8 C storage, and the Ac-LKKTETQ sequence. A matching current certificate is unavailable; historical reports cover only their named samples. | | | | --- | --- | | Compound | TB-500 | | What it is | Actin-binding fragment of thymosin beta-4 | | Sequence | Ac-LKKTETQ (7 amino acids, residues 17-23) | | Not the same as | Full-length thymosin beta-4 (43 amino acids) | | CAS | Check the label and any available report | | Format | Freeze-dried research reference | | Storage | 2-8 C, dry and protected from light | | Lot | TB5-2506 | ## What the research looks at TB-500 is studied as the active fragment of thymosin beta-4, for the part it plays in cell movement and tissue repair - work done in cell cultures and animals. Most of the well-known findings are on the full thymosin beta-4 protein, not this short fragment; the fragment's own direct evidence is limited, and there are no published human trials of it. Published research and historical sample reports do not establish release status for this listed lot. ## Frequently asked questions ### What is TB-500 supplied for? TB-500 is supplied as laboratory research material only. It is 21+ only, not for human consumption, and not for veterinary use. ### Does this page include matching COA information? The product page lists catalog lot, appearance and storage notes for TB-500. Available original reports are labelled by sample; matching current certification is unavailable where the compound, lot or amount differs. A heavy-metals screen does not measure purity or confirm identity. ### How should the vial be handled after delivery? Follow the label and your laboratory's written procedures. Do not treat a historical sample report as current lot documentation. This page repeats 2-8 C storage guidance and light-protection notes before checkout. ### What is TB-500? TB-500 is a synthetic seven-amino-acid peptide, Ac-LKKTETQ, that copies the actin-binding part of the protein thymosin beta-4 (residues 17-23 of the 43-amino-acid protein). It is studied, mostly in cell and animal models, for tissue repair and cell movement. The spec sheet lists it as a freeze-dried research reference in a 5 mg vial. It is not an approved medicine, and Form Labs supplies it for laboratory research only. ### Is TB-500 the same as full-length thymosin beta-4? No. Thymosin beta-4 is a full 43-amino-acid protein, while TB-500 is just seven of those amino acids from the actin-binding region. Much of the well-known research is on the whole protein, so it should not be read as direct evidence for the fragment. The spec sheet keeps this distinction explicit, listing TB-500 as the fragment and not the parent protein. ### Which batch and storage apply to TB-500? The catalog lists lot TB5-2506 and a 10 mg freeze-dried vial. The spec sheet lists storage at 2-8 C, dry and protected from light. The only lab report on file for TB-500 is a Janoshik heavy-metals screen covering a 5 mg vial, batch FL20260410-TB500-5, which reports arsenic, cadmium and mercury as not detected; it does not measure purity and does not confirm identity. Matching current certification is unavailable; these are catalog and historical sample details, not current test findings or use instructions. ## References - Van Troys 1996: Van Troys M et al. EMBO J. 1996;15(2):201-210. Actin-binding region of thymosin beta-4. DOI: 10.1002/j.1460-2075.1996.tb00350.x - Philp 2003: Philp D et al. Wound Repair Regen. 2003;11(1):19-24. The short fragment in a mouse wound model. DOI: 10.1046/j.1524-475X.2003.11105.x - Esposito 2012: Esposito S et al. Drug Test Anal. 2012;4(9):733-738. Synthesis and characterisation of the Ac-LKKTETQ fragment. DOI: 10.1002/dta.1402 This summary is for scientific and educational context only. It is not preparation guidance, administration guidance, or a statement about use in people or animals. --- Canonical page: https://www.formlaboratories.com/shop/tb-500 Form Laboratories - Perth-based research-use-only peptide supplier, shipping Australia-wide. - Site guide for agents: https://www.formlaboratories.com/llms.txt - Sitemap: https://www.formlaboratories.com/sitemap.xml - Full catalogue: https://www.formlaboratories.com/shop - Contact: hello@formlaboratories.com All materials are supplied for laboratory research use only - not for human or veterinary use, and nothing on this site is medical advice.