Description
TB-500 sits in a strange spot in the peptide world. People say the name and assume they mean the full Thymosin Beta-4 protein, all 43 amino acids of it. They don’t. TB-500 is the short synthetic fragment that was isolated because it carries most of the actin-binding activity of the parent molecule, without needing to make the whole protein in a flask. That is the version we supply, and that is the version every CoA in this listing refers to.
The vial holds 5mg of lyophilised peptide, white powder, sealed under argon. Reconstitute with bacteriostatic water inside a class II cabinet and you have a working stock for in vitro models of fibroblast migration, endothelial tube formation, or anything else where actin sequestration is the question you are trying to answer.
What sits behind the label
- Purity: >98% by reversed-phase HPLC, confirmed by mass spectrometry on every batch
- Identity: the TB-500 active fragment, not the full 43-residue parent peptide
- Form: lyophilised powder, acetate salt
- Vial size: 5mg, single-use rubber-stopper vial
- Origin: synthesised in UK and EU facilities, never relabelled bulk from unverified Chinese suppliers
Why labs come back for it
The published research lineage on TB-500 is built around soft-tissue and cardiac repair models. Mouse infarct studies, equine tendon work, corneal epithelial assays. If your protocol cites any of that literature, batch consistency is not a nice-to-have. A peptide that runs clean one lot and contaminated the next will ruin a six-week experiment. Every shipment we send out has been HPLC-traced and MS-confirmed before it left the bench, and the CoA is in the box. If the spec doesn’t match the paperwork, you get a refund. Not a credit, a refund.
Ordering and turnaround
Roughly 90% of UK orders go out and arrive inside 48 hours. We ship from a UK warehouse, so there is no customs delay and no mystery Royal Mail tracking that stops updating in Belgium. If you need ten vials or more for a larger study, message the team through live chat during UK office hours and we will quote bulk pricing per lot. Real humans answer. No bots, no ticket queue.
A note on the naming confusion
Several competitor listings will tell you TB-500 has 43 amino acids. That number is the length of the full Thymosin Beta-4 molecule. The TB-500 fragment is shorter, and that distinction matters once you start comparing your assay results against the published literature. If you need the full-length parent peptide for a specific comparison, ask us and we will point you to the right product.
Sold strictly for in vitro laboratory research. Not for human or veterinary use. UK 18+.
