TB-500

The material we stock under the name TB-500 is recorded in our catalogue as the full 43-residue, N-acetylated peptide Ac-SDKPDMAEIEKFDKSKLKKTETQEKNPLPSKETIEQEKQAGES, catalogued under CAS 77591-33-4, which is thymosin beta-4. That is worth knowing, because the name is used loosely: elsewhere in this market TB-500 often refers to a much shorter fragment built around the LKKTETQ region rather than the complete sequence. The molecular data table above is the authoritative description of what is in our vials.

The table records the formula C212H350N56O78S and a molar mass of 4963.44 g/mol. Thymosin beta-4 is a small acidic protein described in the literature as an actin-sequestering molecule, and the LKKTETQ heptapeptide inside the sequence is the region identified as the actin-binding motif.

Thymosin beta-4 appears in cell-biology literature primarily in connection with actin dynamics: it binds monomeric actin and is described as regulating the pool available for filament assembly, which is the proposed basis for its role in cell migration.

Published studies have reported effects on cell migration in culture, on angiogenesis in endothelial assays, and in dermal and corneal injury models in animals. Several papers examine the LKKTETQ fragment on its own to test whether the actin-binding region accounts for the activity of the whole molecule.

The findings above come from animal, cell and in-vitro models rather than from controlled trials in people, and TB-500 is not an approved medicine in Canada. What we supply is a laboratory reagent, not for human or veterinary use.

Kits Peptides supplies TB-500 as a laboratory reagent. Describing this literature is not an offer of it for any purpose studied in that literature, and nothing on this page is guidance for use in humans or animals.

TB-500 is supplied as a lyophilized (freeze-dried) powder in a sealed glass vial. The label carries the compound name, the nominal mass in milligrams, our batch code and the research-use statement.

Vials ship unopened. Store as the label directs on arrival; the storage guide in the research library covers the general handling of lyophilized peptides. Bacteriostatic water is sold separately as a supply item and is not included unless your order lists it.

TB-500 is stocked in the size or sizes listed above. Quantity discounts apply automatically on multi-vial orders. If the size you need is not listed, the waitlist on a sold-out size still reaches us.

Each order records the batch that filled it, and the batch code is printed on the vial label. Where a third-party certificate of analysis exists for the production lot of TB-500 we received, it is linked in the certificate section above and on the lab results page.

Read those certificates for what they are: they were issued by the laboratory named on them to our supplier for that production lot, and our batch code is the internal receipt reference we assign, so it does not appear on the PDF. We do not currently commission testing in our own name, and product titles make no purity claim for lots without a certificate. The lab standards page explains the full position.

Every order is packed in Kitsilano, Vancouver and ships domestically. Nothing crosses a border, so there is no international transit and no customs hold.

Metro Vancouver addresses can choose same-day courier delivery, priced by distance from our dispatch point; the cutoff for same-day is shown at checkout once you enter a postal code. Everywhere else in Canada ships tracked Canada Post, with the tracking number on your confirmation page and on the order tracking page. Free shipping applies above the threshold shown on the shipping page.

Choose a size, add it to the cart and check out. Checkout records a short attestation that you are 19 or older and purchasing for laboratory research. Payment is by Interac e-Transfer, card, or cryptocurrency; the confirmation page shows the exact steps for the method you picked, and the same steps are emailed to you.

If a size shows as sold out, the waitlist button on that size emails you when it is back. Quantity discounts apply automatically above the subtotals listed on the shop page and do not stack with promo codes.