TB-500 Frag 17-23 — 10mg
REGULATORY NOTICE
These products are laboratory materials supplied for research use only. They are not drugs, natural health products, or food.
They have not been reviewed or authorized by Health Canada for any use in humans or animals, and nothing on this site should be read as a claim that any product treats, prevents or cures any condition.
Not for human or veterinary use.
TB-500 Frag 17-23 is the short active fragment of Thymosin Beta-4: the seven-residue LKKTETQ sequence spanning positions 17 to 23 of the parent peptide, supplied in N-terminally acetylated form. This region is the actin-binding domain, and published analytical work has identified the acetylated 17-23 fragment as the species present in material sold commercially as TB-500.
This is a distinct product from Durham Peptides' TB-500 10mg, which supplies the full-length 43-amino-acid Thymosin Beta-4 peptide. Researchers choosing between them are choosing between the isolated active fragment and the complete parent molecule — a meaningful distinction for work on structure-activity relationships.
QUICK SPECS
Form: Lyophilized peptide powder
Net per vial: 10 mg
Purity: ≥99% (HPLC verified)
Identity: MS-verified (per COA)
Storage: 2–8°C, protect from light and moisture
Reconstitution: Use bacteriostatic water (sold separately)
IDENTITY BASICS
Compound: Acetylated Thymosin Beta-4 fragment 17-23
Sequence: Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln (Ac-LKKTETQ, 7 residues)
Parent compound: Thymosin Beta-4, CAS 77591-33-4 (43 amino acids)
Molecular weight and batch CAS: as stated on the batch COA
Also written as: TB-500 fragment 17-23, Ac-LKKTETQ, TB4 Frag 17-23
WHY CHOOSE DURHAM PEPTIDES FOR TB-500 FRAG 17-23?
independently lab-tested with verifiable COA keys
Both the fragment and full-length Thymosin Beta-4 stocked, clearly distinguished
Same-day shipping across Canada (orders before 4:00 PM EST)
Free shipping on orders over $200 CAD
Transparent Canadian pricing, shown above in CAD
WHAT IS TB-500 FRAG 17-23?
It is the seven-residue LKKTETQ sequence from positions 17 to 23 of Thymosin Beta-4, supplied in N-terminally acetylated form. This region is the actin-binding domain of the parent peptide, and published analytical work has identified the acetylated 17-23 fragment as the species present in commercial TB-500 material.
TB-500 FRAG 17-23 VS TB-500 (FULL THYMOSIN BETA-4) — WHAT'S THE DIFFERENCE?
Length. The fragment is seven amino acids — just the actin-binding domain. Durham Peptides' TB-500 10mg supplies the full-length 43-amino-acid Thymosin Beta-4 peptide. Researchers pick between them depending on whether the work isolates the active domain or uses the complete parent molecule; the two are commonly run in parallel for structure-activity comparisons.
WHY IS THE FRAGMENT ACETYLATED?
N-terminal acetylation is a standard modification that alters a short peptide's stability profile. It is also the form documented in the analytical literature on TB-500 material, which is why the acetylated fragment rather than the bare sequence is the one supplied for research.
HOW SHOULD IT BE STORED AND RECONSTITUTED?
Store the lyophilized vial at 2–8°C, protected from light and moisture. Reconstitute with bacteriostatic water (sold separately) for research handling. Once reconstituted, keep refrigerated and use within an appropriate research timeframe.
HOW IS IT SHIPPED IN CANADA?
Orders placed and paid before 4:00 PM EST ship the same business day via Canada Post Xpresspost with full tracking. Shipping is domestic from within Canada, so there are no customs delays or border holds.
IS THE COA VERIFIABLE?
Yes. Every batch is independently lab-tested with a unique report key you can confirm independently — see our guide on how to verify a lab report key.
For laboratory research use only.
Not for human or veterinary use.
Not intended for diagnosis, treatment, cure, or prevention of any disease.
Use only in controlled laboratory settings by qualified personnel following appropriate safety procedures.
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