Selank

Selank is a synthetic heptapeptide, Thr-Lys-Pro-Arg-Pro-Gly-Pro, built by extending the natural tetrapeptide tuftsin (Thr-Lys-Pro-Arg) with a stabilizing Pro-Gly-Pro tail; it emerged from a tuftsin-analog program at Russian Academy of Sciences institutes.^{14969422, 30255741} Here it is offered as a 10 mg vial of lyophilized peptide for qualified laboratory research, with the certificate for the lot currently in stock displayed on this page.

Research reagent identity

Every identifier on the posted certificate (CAS, CID, formula and approximate mass) agrees with PubChem. The molecule contains no sulfur and carries lysine and arginine side chains, which is why it behaves differently on a column from methionine-containing peptides of similar size.

Research literature

Selank is a synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro) built from the tuftsin sequence with a C-terminal Pro-Gly-Pro extension. Its published literature examines peptide stability and gene-expression profiles in experimental models. Primary sources are linked below for researchers who need the original papers. This listing does not summarise study outcomes and makes no claim about any effect, use or benefit of this product, which is supplied as a reference material for in vitro laboratory research only.

References (PubMed): PMID 30255741, PMID 26924987, PMID 14969422, PMID 12432865, PMID 21609736, PMID 11443939, PMID 16637290

Batch documentation

The certificate box on this page, read on October 2, 2026, listed batch RRL-4692745-P with purity 99.42%, a date of 09 JUL 2026 and the lab horizonanalytical.com. Behind it, the Horizon Analytical purity report (number 1016890) names Revitalized Research LLC as client, records receipt on 07/05/2026 and UPLC-MS analysis on 07/09/2026, confirms the compound as Selank, and gives 9.79 mg measured for a 10 mg specification at 99.42% purity, above its >98% specification. An endotoxin certificate for lot RRL-4692745-E (report 1016889) is also attached, reporting <0.05 EU/mL and a pass.

Before use, read the lot number off the vial and check that it matches the batch on the card; then confirm that the compound name, CAS 129954-34-3 and formula on the PDF match the identity table. Certificates for other lots are posted when available in the COA library. Our walkthrough on verifying a peptide COA covers contacting the lab with a report number, and how to read a peptide COA explains each section of the report.

Storage and handling

As a dry powder, Selank keeps best in its sealed vial in a cold, dark place. Condensation is the main risk when a refrigerated vial is opened, so allow it to equilibrate before the seal is broken and close it again quickly. The vial ships without diluent; reconstitution solution is sold separately. Handling belongs in a laboratory setting under institutional rules, and our storage basics guide covers temperature, light and freeze-thaw for dry peptide stocks.

The same peptide is also listed as Selank 10 mg (Pen), and the wider range is in the Neuropeptide Research category.

Frequently asked questions

What is Selank’s sequence and identity?

Selank is Thr-Lys-Pro-Arg-Pro-Gly-Pro (TKPRPGP), a seven-residue analog of the tetrapeptide tuftsin (TKPR) extended with Pro-Gly-Pro. PubChem lists it as CID 11765600, formula C33H57N11O9, molecular weight 751.9 g/mol, with CAS 129954-34-3 among its synonyms.

Which results appear on the Selank certificate posted here?

The purity report for lot RRL-4692745-P (Horizon Analytical report 1016890, analyzed 07/09/2026) identifies Selank by UPLC-MS and lists 9.79 mg found against a 10 mg specification with 99.42% purity. The matching endotoxin report, lot RRL-4692745-E (report 1016889), shows a pass at <0.05 EU/mL.

Is the Selank pen the same compound as this vial?

Yes, the compound is the same; the format is what changes. This page sells dry powder in a 10 mg vial for the lab to reconstitute, while the 10 mg pen is a separate pen-format listing. On October 2, 2026 the pen page carried the same RRL-4692745-P certificate card as this vial.

What storage conditions suit lyophilized Selank?

Keep the sealed vial cold, dry and shielded from light per the label and your SOPs. Like other dry peptide powders it can pick up moisture from the air, so let a cold vial reach room temperature before opening and reseal it promptly. Diluent is sold separately.

Related reading: TFA vs acetate peptide salts explains what the counterion listed with a synthetic peptide means and how it is measured.

For research use only. Not for human or animal consumption, administration, injection, topical use, medical, clinical, veterinary, food, cosmetic, supplement, household, or other personal use. This site does not provide medical advice, and this product is not intended to diagnose, treat, cure, mitigate, or prevent any disease.

These statements have not been evaluated by the Food and Drug Administration. Review the available COA or batch documentation and follow applicable laws, institutional protocols, and safety procedures before handling.

Batch documentation for Selank is organized by product, selected variant, and available lot when supplied. Review available COA records, purity or quality documentation, and product identifiers before purchase and before any laboratory handling.

If documentation is not displayed for a selected size or lot, contact support before ordering. Documentation is provided for research recordkeeping and product verification only.

Keep this material sealed until controlled laboratory handling. Store and handle only according to the product label, available COA or SDS, institutional SOPs, and applicable laws.

Use appropriate personal protective equipment and restrict access to qualified personnel. This material is not for human or animal consumption, administration, injection, topical use, medical, clinical, veterinary, food, cosmetic, supplement, household, or other personal use. Dispose of waste according to laboratory protocol and local requirements.