HPLC purity
Reverse-phase HPLC with UV detection; purity target reported per lot with related-substance reporting on request.
Pepti · Catalog · Frag 17-23 (TB-500 Fragment 17-23, Ac-LKKTETQ)
Thymosin β4 active fragment · research-use
TB-500 Frag 17-23 OEM supply.
Research-grade Ac-LKKTETQ heptapeptide — the actin-binding active core of thymosin beta-4 — supplied lyophilized with a per-batch HPLC/MS COA for labs and private-label brands.
Frag 17-23 (TB-500HPLC ≥ 98%MS confirmed10mg
Vial illustrations reflect supplied lyophilized format. Distribution scope and destination market confirmed before invoicing.
| Compound | Frag 17-23 (TB-500 Fragment 17-23, Ac-LKKTETQ) |
|---|---|
| CAS number | 885340-08-9 |
| Class | Growth-hormone axis & repair |
| Molecular formula | C38H68N10O14 |
| Molecular weight | 889.0 g/mol (889.02) |
| Sequence | Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln (Ac-LKKTETQ) |
| Form | Lyophilized powder, sterile glass vial |
| Purity target | ≥ 98% by HPLC |
| Vial formats | 10mg |
| Documentation | COA + HPLC + MS, batch lot file where available |
| Distribution scope | Research use, worldwide |
| Storage | Lyophilized powder is stable sealed at -20°C, protected from light and moisture; -80°C for long-term storage. After reconstitution with bacteriostatic water, keep refrigerated at 2-8°C and use within a short window for research work. |
MOQ & lead time
| Tier | Quantity | Lead time |
|---|---|---|
| Sample lot | From 50 vials | 3–7 days |
| Production lot | 200–1,000 vials | 10–14 days |
| OEM repeat | 1,000+ vials | 14–18 days, scheduled |
Frag 17-23 is the synthetic N-acetylated heptapeptide Ac-LKKTETQ (CAS 885340-08-9), the actin-binding 17-23 active core of thymosin beta-4, supplied as a research-use lyophilized powder.
Documentation
Batch documentation support for Frag 17-23 (TB-500 Fragment 17-23, Ac-LKKTETQ) lots.
COA / HPLC / MS document support where available. Distribution scope confirmed before invoicing.
MS identity
Mass spectrometry identity confirmation against the Frag 17-23 (TB-500 Fragment 17-23, Ac-LKKTETQ) reference profile.
Lot traceability
Compound prefix and lot serial printed on the vial label and repeated in the document pack and carton.
FAQ
Frag 17-23 (TB-500 Fragment 17-23, Ac-LKKTETQ) — frequently asked by B2B buyers.
How is Frag 17-23 different from full-length TB-500 / thymosin beta-4?
Frag 17-23 is the short seven-residue active core (Ac-LKKTETQ, residues 17-23), whereas full-length thymosin beta-4 is a 43-residue protein. We supply both as separate research-use SKUs so labs can select the fragment or the full sequence, and specifications for each are stated on its own COA.
What documentation ships with each batch?
Each lot ships with a Certificate of Analysis including HPLC purity, mass-spec (ESI-MS or MALDI-TOF) identity confirmation, and appearance and water-content data. Additional documentation such as residual-solvent or endotoxin testing is available on request.
What purity and format do you supply?
Frag 17-23 is supplied as a lyophilized white powder, typically at least 98% by HPLC, in 10mg vials. Purity threshold, counter-ion, and fill can be specified for OEM and private-label orders.
What is the minimum order quantity and can you do private-label?
Catalog MOQ is 50 vials at 10mg. We manufacture for OEM and private-label programs, including custom vial fills, labeling, and bulk lyophilized peptide-powder supply under separate quotation.
Is this compound offered for research use only?
Yes. Frag 17-23 is sold strictly for laboratory and in-vitro research use and is not a food, drug, cosmetic, or medical product. Buyers are responsible for compliance with all applicable import, handling, and end-use regulations in their jurisdiction.
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