Selank is a synthetic heptapeptide with the reference sequence TKPRPGP, supplied as a lyophilised research material for controlled studies of neuropeptide signalling, GABAergic-system interactions, gene-expression responses and functional connectivity.
Research material only
This material is not supplied as a medicine, treatment, supplement or consumer product. It is not for human or veterinary use, consumption or administration, and is not intended to diagnose, treat, cure or prevent any disease.
Compound overview
CompoundSelank
Reference sequenceTKPRPGP
Research classSynthetic heptapeptide
Related peptideTuftsin analogue
Reference molecular massApproximately 751.9 Da
FormLyophilised material
Research context
Selank is a seven-amino-acid peptide with the sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro. Its N-terminal TKPR motif corresponds to the tetrapeptide tuftsin, while the C-terminal Pro-Gly-Pro extension distinguishes the Selank sequence.
Published experimental work has examined Selank in cellular gene-expression assays, rat behavioural and neurochemical models, hippocampal transcriptome studies and exploratory functional-connectivity research. These studies provide compound-level context only and do not establish the identity, performance or suitability of the material supplied on this page.
Batch documentation
Independent analytical documentation is published where available for specific batches and variations. A result indicator appears only when a published record is available. Match the vial size and batch identifier to the corresponding report before relying on any result.
Supply and laboratory handling
- Supplied in the vial size selected above.
- Provided as a lyophilised material for laboratory research.
- Use calibrated equipment and an independently validated protocol appropriate to the intended study.
- Record the product designation, vial size, batch identifier and preparation conditions in the laboratory record.
Frequently asked questions
What is Selank?
Selank is a synthetic seven-amino-acid peptide with the reference sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro, abbreviated TKPRPGP.
How is Selank related to tuftsin?
Selank contains the tuftsin tetrapeptide sequence TKPR at its N-terminus, followed by a Pro-Gly-Pro extension. It is therefore commonly described in the literature as a tuftsin analogue.
What research is linked on this page?
The Research tab links to compound-identification data and published studies concerning GABAergic gene expression, hippocampal transcription, functional connectivity and BDNF-related rat models. These sources provide scientific context and are not product-performance claims.
Which vial sizes are available?
Current vial sizes and availability are shown in the size selector above. This information updates with the product variations rather than being fixed in the description.
Are published laboratory results available?
Where a published batch record exists, a result indicator appears beside the applicable variation and the corresponding documentation is available on the lab-results page. No indicator means that no product-specific published result is currently displayed for that variation.
How should Selank be stored?
Protect sealed lyophilised vials from light, moisture and repeated temperature changes. After reconstitution, store the reconstituted solution refrigerated at 2–8°C and follow a validated laboratory protocol for handling and use.
Information reviewed 29 August 2026.
Batch-specific analytical documentation
Independent analytical results are published for selected Havoc Labs products, vial sizes and batches. The result attached to one variation must not be treated as evidence for a different size or batch.
- Result available: a published report is available for the marked variation.
- Test pending: a sample has been submitted, but no completed result is being claimed.
- No indicator: no product-specific result is currently displayed for that variation.
Check the identifiers
Always match the compound, vial size and batch reference on the product to the corresponding laboratory record. Where the laboratory provides an independent verification facility, use it to confirm the report.
Browse published lab results →
Storage and stability
Storage requirements can vary by compound, physical form, intended storage duration and batch. Follow the lot-specific documentation and your laboratory’s validated procedure wherever these are available.
| Form |
Suggested storage |
Important note |
| Sealed lyophilised material |
Keep in a cool, dry place, refrigerated at 2–8°C or frozen, as appropriate for the compound and intended storage period. |
Keep sealed, dry and protected from direct light. Follow compound- and batch-specific documentation and avoid repeated temperature cycling. |
| Reconstituted solution |
Refrigerate at 2–8°C unless the applicable laboratory protocol specifies otherwise. |
Stability depends on the preparation conditions, solvent, concentration, container and handling. No universal storage period is claimed. |
No universal shelf-life is claimed
Do not assume a fixed expiry or prepared-solution storage period unless it is supported by relevant stability data or batch documentation. Where a lot-specific document gives different instructions, that document takes precedence.
Published research
The sources below concern Selank under the materials and experimental conditions used by their authors. They provide compound-level scientific context and do not establish the identity, purity, performance or suitability of any supplied batch.
- PubChem. Selank — Compound Summary, CID 11765600. Reference sequence, formula, structure and computed molecular mass for Selank. View on PubChem ↗
- Volkova AA et al. GABA, Selank, and Olanzapine Affect the Expression of Genes Involved in GABAergic Neurotransmission in IMR-32 Cells. Frontiers in Pharmacology, 2016. Neuroblastoma cell-culture research examining expression of genes associated with GABAergic neurotransmission. View on PubMed ↗
- Kolomin TA et al. Transcriptome alteration in hippocampus under the treatment of tuftsin analog Selank. Zhurnal Vysshei Nervnoi Deiatelnosti, 2013. Rat hippocampal transcriptome research following single and repeated experimental exposure. View on PubMed ↗
- Panikratova YaR et al. Functional Connectomic Approach to Studying Selank and Semax Effects. Doklady Biological Sciences, 2020. Exploratory resting-state functional-connectivity research in 52 healthy participants. View on PubMed ↗
- Kolik LG et al. Selank, Peptide Analogue of Tuftsin, Protects Against Ethanol-Induced Memory Impairment by Regulating of BDNF Content in the Hippocampus and Prefrontal Cortex in Rats. Bulletin of Experimental Biology and Medicine, 2019. Rat-model research examining behaviour and regional BDNF content. View on PubMed ↗
Experimental literature is not product or clinical evidence
The cited literature includes cell-culture, animal-model and small exploratory human research. It does not establish safety or efficacy for any use and does not establish the identity, purity or performance of the material supplied on this page. Confirm the reference sequence and batch identifier against the applicable analytical documentation.
