What Is Selank?

Selank begins with tuftsin, a short natural peptide that occurs as a fragment of an antibody molecule. Building on that core and adding a terminal extension produces Selank, a seven-residue synthetic peptide studied in neuropeptide research. The text here describes the molecule and its place in the literature, and does not address use.

Selank’s parent, tuftsin, is itself a fragment: a short sequence that occurs within the heavy chain of an antibody molecule. On its own it is brief and quickly broken down, which limits how it can be studied. Selank takes that core and lengthens it with a stabilising extension, producing a defined seven-residue peptide that holds together long enough to be characterised.

That lineage is worth keeping in view, because it explains both what Selank is and why it was made. It is a stabilised, synthetic version of a natural fragment, designed for the laboratory rather than taken from biology intact, and it shares this make-a-fragment-durable logic with other short peptides of its era.

Tuftsin on its own is brief and quickly broken down. Selank extends it with additional residues that resist that breakdown, the same broad design idea seen in other short neuropeptides. The peptide is produced synthetically rather than isolated, as outlined in solid-phase peptide synthesis.

Selank is compact and water-friendly, supplied as a lyophilised powder and listed as Selank in the catalogue. The notion of a peptide and how its residues are described is covered in what is a peptide?

A defined, stabilised analogue of a natural fragment is a convenient research subject: short enough to characterise cleanly, yet anchored to a real parent sequence. Selank is studied in that spirit, as a stable representative of the tuftsin family rather than for any property attributed to it.

The appeal is also one of contrast. Because Selank differs from its parent mainly by the stabilising extension, it offers a way to study what that single design choice changes, with the natural fragment as the comparison. A defined analogue that maps cleanly back onto a known parent sequence is an efficient research subject, since the question of what the modification does can be asked directly rather than inferred from a more complicated redesign.

Selank features in neuropeptide research, examined as a tuftsin-derived sequence in laboratory systems. The sibling short neuropeptide is profiled in what is Semax?, and other compounds studied in signalling research are in the research catalogue.

The study areas and the limits of the evidence are taken up in the Selank research overview, and the practical side of keeping a soluble short peptide in good order is in the Selank storage & handling guide.

All products are supplied strictly for laboratory research use only. Not for human or animal consumption. Not a drug, supplement, or food. Not for diagnostic or therapeutic use. The material on this page is educational and factual: it summarises areas of published scientific investigation and general laboratory practice. It is not guidance for the use of any material in humans or animals, and nothing here should be read as a claim about safety, performance, or outcomes. Where a specific product specification or safety data sheet is provided with a material, that document is the definitive reference and takes precedence over any general information given here.