Selank 5mg

Tuftsin analog heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro) with Pro-Gly-Pro stability extension Developed at the Institute of Molecular Genetics, Russian Academy of Sciences CAS 129954-34-3 For in vitro neuropeptide research only

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For laboratory research use only. Not for human or veterinary consumption. SKU SK5.

Overview

Product details.

Selank 5mg — Tuftsin Analog

Tuftsin is a four-amino-acid immunomodulatory peptide (Thr-Lys-Pro-Arg) produced naturally during immunoglobulin degradation. On its own, it degrades quickly. Selank solves that problem by appending a Pro-Gly-Pro tail — the same aminopeptidase-resistant extension used in Semax — creating a stabilized heptapeptide that bridges immunomodulatory and neuropeptide research.

Research-Grade Compounds

Manufactured to research-grade standards for laboratory research use only.

Discreet Shipping

Every order ships in plain, protective packaging.

In-House Fulfillment

Orders are inspected, packed, and shipped directly by the Heritage Labs team.

Specifications

Sequence	Thr-Lys-Pro-Arg-Pro-Gly-Pro
Amino Acids	7 (tuftsin 1-4 + PGP extension)
Molecular Formula	C₃₃H₅₇N₁₁O₉
Molecular Weight	751.87 g/mol
CAS Number	129954-34-3
Form	Lyophilized powder
Quantity	5mg per vial

Research directions

Three main lines of investigation appear in the published literature. First, enkephalin pathway interactions — Selank’s effects on carboxypeptidase activity and enkephalinase enzyme kinetics in neurochemistry assays. Second, neurotrophic factor expression — BDNF gene expression and GABA receptor modulation in neuronal cultures, plus serotonin metabolite profiling and dopaminergic system interactions. Third, cytokine system research — IL-6 pathway interactions and inflammatory mediator expression in immune cell models, connecting its tuftsin heritage to immunomodulatory function.

Selank vs Semax

Same lab, same PGP tail, different parent sequences. Selank derives from tuftsin (immunomodulatory). Semax derives from ACTH(4-10) (neuroendocrine). The published literature examines them in distinct but overlapping contexts — Selank for immunomodulatory and enkephalinase work, Semax for neurotrophic factor and neuropeptide studies. Heritage Labs USA carries both.

Frequently paired with

Semax 5mg — Complementary neuropeptide research.
DSIP 5mg — Sleep and neuroendocrine signaling.

Quality and testing

Every Heritage Labs compound is manufactured to research-grade standards and shipped in protective packaging.

Storage

Lyophilized: -20°C
Reconstituted: 2-8°C, use within 30 days

For laboratory research use only. Not for human or veterinary use.

For laboratory research use only. Not for human or veterinary use. This product is not a drug or supplement and is not intended to diagnose, treat, cure, or prevent any disease.

FDA Disclaimer. All products are for research use only (RUO) as defined by the FDA — not for diagnostic, human, or veterinary use. These products have not been evaluated and have not been approved by the U.S. Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease.

Heritage Labs is a chemical supplier providing products strictly for laboratory research, analytical, and in-vitro purposes; it is not a compounding pharmacy or compounding facility under Section 503A, nor an outsourcing facility under Section 503B, of the Federal Food, Drug, and Cosmetic Act.