Selank is a synthetic heptapeptide derived from tuftsin, a naturally occurring four-amino acid fragment of immunoglobulin G. It takes tuftsin's Thr-Lys-Pro-Arg sequence and adds the stabilizing Pro-Gly-Pro tail, producing a peptide studied extensively in anxiolytic-model and immune-signaling research. Like its sibling Semax, Selank comes out of the Russian peptide research tradition and carries one of the deeper preclinical literatures in this catalog. Heartland Bio Labs supplies Selank for laboratory research in 10mg vials, independently verified.
What Selank is
Selank is one half of a pair of neuropeptides developed in the same Russian research tradition. Our article on Semax and Selank, the Russian neuropeptides traces where both compounds come from and how they differ.
Tuftsin itself is a fragment of an antibody heavy chain, first described in the 1970s, with a research history in immune cell signaling. Selank extends that tetrapeptide by three residues, the same Pro-Gly-Pro stabilization used in Semax, which slows enzymatic breakdown enough to make the molecule practical for research use. The published work on Selank spans anxiety-related behavioral models, GABAergic signaling, and immune markers, almost all of it preclinical and much of it originally in Russian-language journals. Our Selank research overview covers the structure and the research landscape.
Product characteristics
- Synthetic heptapeptide: Thr-Lys-Pro-Arg-Pro-Gly-Pro (tuftsin plus Pro-Gly-Pro)
- Approximate molecular weight: 751.9 g/mol
- Supplied as white lyophilized powder in sealed vials
- Available strength: 10mg; a 5mg vial appears on the selector with a notify option when not in stock
- HPLC purity and mass spectrometry identity, tested by an independent laboratory
- For laboratory research use only
How this product is verified
Every Selank vial we sell traces to independent laboratory analysis: HPLC for purity, mass spectrometry to confirm the molecule is the 751.9-dalton heptapeptide the label claims. The certificates are published in our COA portal, and our guide on reading a peptide certificate of analysis walks through what each field on the document proves. With a compound this small, identity testing is the number to insist on from any supplier.
Selank and Semax
The pairing question comes up constantly, so here is the compositional answer: Semax derives from the hormone ACTH and anchors the cognition and neurotrophic side of the literature, while Selank derives from the immune peptide tuftsin and anchors the anxiolytic-model side. They share the same stabilizing tail and the same research tradition, which is why comparative programs almost always run them together. We stock both, tested the same way.
Pricing, storage, and shipping
The 10mg vial is $89, in stock, with same-day dispatch from the Tulsa, Oklahoma area for orders placed before 2:00 PM Central. Keep lyophilized vials sealed, cool, dry, and away from light; reconstitute with bacteriostatic water and refrigerate the solution within your protocol's window. Larger programs can use our wholesale program, and our supplier vetting guide applies to us as much as anyone.
Reconstitution math
Work out concentration (mg/mL), amount per volume and molarity for any vial size with the general peptide calculator. For the bench procedure see how to reconstitute peptides.
Research use only
Selank from Heartland Bio Labs is sold strictly for laboratory research and identification purposes. It is not a drug, it has not been evaluated by the FDA, and it is not for human or veterinary use of any kind. By purchasing, you affirm that you are qualified to handle research compounds and agree to our research use policy.
