- ≥99% by HPLC
- Lot-matched certificate of analysis
- Ships next business day, tracked
Selank Peptide
Tuftsin-derived heptapeptide for anxiolytic and immune signaling research
- FormLyophilized white powder in a sealed glass vial
- Mol. weight751.89 g/mol
- Research areasAnxiety-like behavior, GABAergic and monoaminergic signaling, cytokine expression, BDNF
Overview
Selank is a synthetic heptapeptide derived from tuftsin, the immunomodulatory tetrapeptide Thr-Lys-Pro-Arg found in the Fc region of immunoglobulin G. As with Semax, a Pro-Gly-Pro tail is attached to the C-terminus to slow peptidase cleavage, giving the seven-residue sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro and a molecular weight of 751.89 g/mol.
Peptide Medix supplies Selank as a lyophilized powder in 5 mg and 10 mg vials for in vitro assays, analytical work and approved animal model research. Each lot is HPLC-verified with a matched certificate of analysis and ships from a US facility.
Specifications
Identity
- CAS number
- 129954-34-3
- Molecular formula
- C33H57N11O9
- Molecular weight
- 751.89 g/mol
- Amino acid sequence
- Thr-Lys-Pro-Arg-Pro-Gly-Pro
- Peptide class
- Synthetic tuftsin analog / regulatory neuropeptide
Supply & purity
- Form
- Lyophilized white powder in a sealed glass vial
- Purity
- ≥99% by HPLC; lot-matched COA available
- Available sizes
- 5 mg, 10 mg
- Solubility
- Freely soluble in bacteriostatic water and sterile water
Handling & storage
- Storage (lyophilized)
- −20 °C, protected from light and moisture
- Storage (reconstituted)
- 2–8 °C; avoid repeated freeze-thaw cycles
Additional detail
- Parent molecule
- Tuftsin (Thr-Lys-Pro-Arg), an IgG-derived immunopeptide
- Research areas
- Anxiety-like behavior, GABAergic and monoaminergic signaling, cytokine expression, BDNF
Working out the concentration
Because Selank arrives dry, its concentration is a decision rather than a specification. Run the numbers through the reconstitution calculator — vial mass in, diluent volume in, mg/mL and mass per syringe unit out.
For work specified in µM or nM rather than mg/mL, feed 751.89 g/mol and your volume into the peptide molarity calculator.
Certificate of analysis
Every lot of Selank is released against a certificate of analysis: the batch-specific laboratory data for that lot, not a generic document for the compound. The lot number on the certificate matches the lot number printed on the label you receive — the vial label itself, where the product is vialled — so the record and the material it describes can always be reconciled.
Purity: ≥99% by HPLC — the specification for this listing. The figure for the lot you receive is the one reported on that lot’s certificate.
No lot certificate is on display on this page at the moment. That is a publishing state and not a testing one: lots are released and documented as described above whether or not the document is posted here, and we will send what exists for the lot in stock, or for a lot already on your bench, by its number.
Certificates are available on request before you order as well as after, with no account and no charge. Request the certificate for this listing, read the testing and documentation policy in full, or see how to read a peptide COA.
Questions about Selank
How is Selank tested for purity?
Each lot is assayed by reversed-phase HPLC for purity and confirmed by mass spectrometry for identity. A lot-matched certificate of analysis listing purity, observed molecular mass and test date is available on request, so the documentation corresponds to the specific batch shipped to you.
What sizes and prices are offered?
Selank is available as a 5 mg vial and a 10 mg vial of lyophilized powder. Choosing the larger vial keeps a longer experimental series on a single lot number, which simplifies analytical comparison across runs.
Is Selank stable in solution?
Lyophilized powder stored at −20 °C is the stable form. In aqueous solution, peptides of this class are best kept refrigerated at 2–8 °C, protected from light, and used within the planned study window. Repeated freeze-thaw cycles should be avoided.
What solvent is recommended?
Selank is freely water soluble; bacteriostatic water is the standard choice for benchtop reconstitution, and sterile water is used where a preservative-free solution is required. Working concentration is determined by your own assay protocol.
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