TB-500 fragment 17-23 (LKKTETQ)

LKKTETQ is residues 17 to 23 of thymosin beta-4, the actin-binding segment of the protein, without N-terminal acetylation.

Purity, content and identity from $250 per vial. Endotoxin, sterility and heavy metals at Gold and Elite. Results in 3 to 5 business days; sterility 14 days.

Structure

2D structure of tb-500-fragment-17-23 drawn in Vanguard Laboratory colors

TB-500 fragment 17-23 (LKKTETQ): 2D structure drawn from the PubChem record. Stereochemistry shown as registered.

Compound data

476014-70-7

C36H66N10O13

847.0 g/mol (monoisotopic 846.48)

Linear heptapeptide

Sequence and names

Sequence: LKKTETQ-OH, 7 residues; no acetyl group

Other names: Thymosin beta-4 (17-23), fequesetide

The product usually sold as TB-500 is the N-acetylated form of this peptide (889 g/mol); see the TB-500 page.

How we test it

Every level includes purity, quantity, identity and a solubility check. Pick the level that matches what you need to know.

$250

Purity and quantity by reversed-phase HPLC with the detector matched to the compound, identity against a reference standard, solubility check. 1 vial.

$550

Silver plus endotoxin (USP 85) and sterility (USP 71). 3 vials.

$700

Gold plus heavy metals by ICP-MS and a fentanyl screen. 4 vials.

Turnaround and reporting

Purity, quantity and identity are reported in 3 to 5 business days after the samples are logged in. Sterility adds a 14-day incubation, and you get a preliminary COA while it runs. The COA carries a QR code that opens the current version of the report on verifiedbyvanguard.com.

Order

Start an order online, or send the compound name and the tests you need for a quote.