Molecular Characteristics
Complete Specifications
Structural Composition
Thr-Lys-Pro-Arg-Pro-Gly-Pro
Physical Properties
Selank is a synthetic heptapeptide derived from the endogenous immunomodulatory peptide tuftsin. Its short chain length supports efficient aqueous solubility and practical laboratory handling. As a linear peptide, it remains susceptible to enzymatic degradation in biological environments, making lyophilized storage under cold, dry conditions important for maintaining stability. Protection from moisture, light exposure, and repeated freeze–thaw cycles helps preserve structural integrity and analytical consistency during research applications.
Analysis & Documentation
Identity
Each production lot is checked against the reference structure recorded for this compound:
- Classification — Synthetic heptapeptide (tuftsin analog)
- Molecular formula — C₃₃H₅₇N₁₁O₉
- Expected mass — ~751.87 Da
- CAS registry — 129954-34-3
- Chain length — 7 amino acids
- PubChem CID — Not available
Analytical Methods
Testing is carried out per lot by an independent laboratory. The methods measure what the material is and how much of it is the target compound:
- RP-HPLC — reverse-phase separation of the target from process-related impurities; purity is reported as area percent of the main peak
- Mass spectrometry — observed mass compared against the expected molecular mass above
- Retention time — compared against a reference standard run under the same conditions
- Chromatogram — reproduced on the certificate so the peak and any shoulders can be inspected directly
Material & Documentation
What arrives, and how to tie it back to its paperwork:
- Appearance as supplied — White to off-white lyophilized powder
- Solubility — Water, buffered aqueous solutions (e.g., PBS)
- Lot number — printed on the container label and used to look up the certificate
- Certificate — indexed by lot at Certificates of Analysis
Laboratory Handling and Storage Protocols
Lyophilized Powder Storage
- Store at –20°C to –80°C in the original, sealed vial
- Protect from light exposure and moisture
- A desiccated storage environment is recommended
- Stability data suggests extended stability when stored at −20 °C or below.
Reconstituted Solution Storage
- Short-term storage: Up to 7 days at 4°C
- Long-term storage: Store at –20°C in aliquots
- Use single-use aliquots to preserve peptide integrity
- Minimize freeze–thaw cycles; single-use aliquots are strongly recommended
Stability Characteristics
Selank is a synthetic peptide research compound that demonstrates stable handling characteristics when managed according to standard peptide laboratory protocols. Proper cold storage of the lyophilized material, careful reconstitution, and minimized freeze–thaw exposure help maintain structural integrity and solubility. When handled appropriately, Selank supports consistent use in in vitro and analytical research applications.
Frequently Asked Questions
What is Selank?
Selank is a synthetic seven–amino acid peptide developed for experimental research into neurotransmitter signaling and neuroimmune regulatory pathways.
Is Selank naturally occurring?
No. Selank is a synthetically engineered peptide, although it is structurally derived from tuftsin-related research. It does not occur naturally in this exact form.
How does Selank differ from Semax?
Selank and Semax are structurally distinct peptides studied in neuropeptide research. Selank is commonly investigated for GABAergic and immune-related signaling models, while Semax is more often studied for neurotrophic factor and monoaminergic pathway interactions.
How is Selank supplied?
Selank is typically supplied as a lyophilized (freeze-dried) powder in sealed research vials to preserve stability during storage and shipment.
How should unreconstituted Selank be stored?
Lyophilized Selank should be stored:
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Long-term: −20 °C to −80 °C
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Short-term: 2–8 °C
Keep vials sealed and protected from light and moisture until use.
How should reconstituted Selank be handled and stored?
Once reconstituted:
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Store at 2–8 °C for short-term laboratory use
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For extended storage, aliquot and freeze at −20 °C or below
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Minimize freeze–thaw cycles using single-use aliquots
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Gently swirl to mix; avoid vigorous agitation
Does Selank require a Certificate of Analysis (COA)?
Yes. A Certificate of Analysis (COA) should be available for each batch of Selank, verifying identity, purity, and analytical testing results to ensure research quality and traceability.
Is Selank FDA-approved?
No. Selank is not FDA-approved as a drug, supplement, or therapeutic product. It is sold exclusively as a research compound and must not be marketed or used for diagnostic, therapeutic, or consumption purposes.
Research Background
For a referenced overview of what the published research on this compound examines — and why nearly all of it is Russian and unreplicated — see What Is Selank? Research Background and Study Areas. It cites peer-reviewed sources and contains no dosing guidance.
This product is not for human consumption. It is sold strictly for research and educational purposes and is not intended to diagnose, treat, cure, or prevent any disease.
Any clinical data or research information referenced on this page is derived from peer-reviewed scientific literature and official publications. This information is provided for educational reference only and does not constitute medical advice or product claims.
By purchasing this product, you acknowledge that you are a qualified researcher and agree to use it in full compliance with all applicable laws and regulations.
