Neuropeptide Research · New
Selank — Research Peptide
Synthetic heptapeptide analog of the endogenous immunomodulator tuftsin, studied for GABAergic and monoamine pathway modulation and BDNF expression in preclinical neuroscience models.
$44.99 · 10mg
Third-party tested · Freedom Diagnostics
View COA · Third-party COA · Lot EP-1732K
- Ships from within the U.S.
- Pay by card, Apple Pay, Venmo, Cash App or crypto
- Stored frozen at −10 °F until ship day
- Batch ID and QR code on the label
For in-vitro laboratory research use only. Not for human consumption.
Specifications
Selank at a glance.
- Size
- 10mg
- Form
- Lyophilized powder
- Storage
- −20°C (Protected from light and moisture)
- Purity
- 99.36% (HPLC-UV · Freedom Diagnostics COA)
- Molecular weight
- 751.88 g/mol
- Molecular formula
- C₃₃H₅₇N₁₁O₉
- Certificate of Analysis
- Third-party tested (Lot EP-1732K · Freedom Diagnostics)
- Category
- Neuropeptide Research
- Sequence
- Thr-Lys-Pro-Arg-Pro-Gly-Pro
Third-party COA · Lot EP-1732K
Documented by a third-party lab.
Issued by Freedom Diagnostics Testing, an independent lab, with Excalibur Peptides as the client. It covers lot EP-1732K. The PDF here is the same report the lab hosts.
Independent verification
Verify on Freedom Diagnostics.
This Selank Certificate of Analysis is hosted on Freedom Diagnostics Testing's own site. Search the code below on the lab's lookup page, or open the lab-hosted PDF. Values are shown as printed on the certificate.
Search code: Exca2608030567
- Lab
- Freedom Diagnostics Testing
- Lot
- EP-1732K
- Sample
- Selank 10mg
- Received
- 8/3/2026
- Reported
- 8/6/2026
- Purity (HPLC-UV)
- 99.36%
- Identity (LC-MS)
- Confirmed
- Net content
- 10.81 mg
View lab-hosted COA (PDF on coas.freedomdiagnosticstesting.com)
What's in the box
One vial, part by part.
10mg of Selank, supplied as a lyophilized powder in a sealed glass vial.
On the label
Clearly labeled.
Printed label
Product name, size and a research-use-only statement.
Batch ID
A batch number is printed on every label.
QR code
Printed on the label, next to the batch ID.
Research-use line
“For research and laboratory use only — not for human consumption” runs along the bottom of the label.
More in Neuropeptide Research.
Research
Research background.
Chemical identity, proposed mechanism and published preclinical literature, for laboratory reference.
Mechanism of action
Selank is a synthetic heptapeptide constructed from the endogenous tetrapeptide tuftsin (Thr-Lys-Pro-Arg) extended with a Pro-Gly-Pro sequence that markedly increases enzymatic stability. Published preclinical work has examined its effects on GABAergic transmission, monoamine turnover in limbic structures, BDNF expression in the hippocampus, and enkephalin-degrading enzyme activity.
Research observations
- GABA-A receptor subunit expression examined in rodent limbic tissue
- Serotonin and dopamine turnover examined in preclinical models
- Hippocampal BDNF expression examined in animal studies
- Enkephalin-degrading enzyme inhibition reported in vitro
- C-terminal Pro-Gly-Pro extension confers resistance to peptidase degradation
Key research & publications
- Kozlovskii & Danchev (2003) — Examined Selank in a rodent conditioned-reflex paradigm.
- Volkova et al. (2016) — Examined hippocampal BDNF expression and monoamine metabolism in rat models exposed to Selank.
- Kolomin et al. (2013) — Transcriptome analysis of Selank-associated gene expression clusters related to immune and neurotransmitter signaling.
Further reading
A longer overview of published Selank literature on this tuftsin-derived heptapeptide, in our 2026 guide.
Frequently asked questions.
What is Selank?
Selank is a synthetic heptapeptide, Thr-Lys-Pro-Arg-Pro-Gly-Pro, built from the tuftsin tetrapeptide with a Pro-Gly-Pro extension that increases enzymatic stability. Published preclinical work has examined GABAergic transmission, monoamine turnover and BDNF expression in rodent models.
Where can I buy Selank for research?
Excalibur Peptides sells Selank on this page as a 10mg vial of lyophilized powder, for in-vitro laboratory research only. Orders ship from Austin, Texas, to addresses within the United States, and the product's third-party Certificate of Analysis is published in our COA database. Buyers must be 21 or older and confirm research-use-only status at checkout.
How is Selank tested, and where is its COA?
Selank is third-party tested by Freedom Diagnostics Testing: purity by HPLC and identity by LC-MS. The Certificate of Analysis is published in our COA database, and the report can be looked up on the lab's own site with search code Exca2608030567.
How should Selank be stored in the lab?
Keep lyophilized Selank sealed at −20 °C, protected from light and moisture, as listed on this page. Let the vial reach room temperature before opening so moisture does not condense on the powder, and avoid repeated freeze–thaw cycles.
How fast does Selank ship?
Selank ships from Austin, Texas. Orders placed before 2 PM EST on a business day ship the same day, and delivery within the United States typically takes 2–4 business days. A tracking number is emailed when the order ships.
What payment methods can I use to buy Selank?
We accept credit and debit cards, Apple Pay, Venmo, Cash App and cryptocurrency. Prices are in U.S. dollars.
Is Selank approved by the FDA?
No. The Selank supplied by Excalibur Peptides is not approved by the FDA for human or veterinary use. It is sold only for in-vitro laboratory research and identification purposes and is not for human consumption.
For research and laboratory use only. Not for human consumption.
All products sold on this website are intended for in-vitro laboratory research and identification purposes only. They are not for human or veterinary use and are not for human consumption.
All information is provided for educational and research purposes. Excalibur Peptides does not condone or promote the use of any product for any purpose other than legitimate scientific research and compound identification.