Description

Selank Peptide Overview

Selank Peptide is a synthetic heptapeptide that has been studied in laboratory and pharmacological research, particularly in research involving neuropeptide signaling, neurotransmitter-related pathways, and peptide structure–activity relationships.

Chemically, Selank is composed of seven amino-acid residues with the sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro (TKPRPGP). PubChem lists Selank under CAS 129954-34-3, with a molecular formula of C₃₃H₅₇N₁₁O₉ and a molecular weight of approximately 751.9 g/mol.

For researchers, accurate identity is particularly important when purchasing short synthetic peptides. The sequence, molecular weight, analytical purity, and batch-specific documentation should all agree.

«Research Use Only: Selank Peptide is supplied for laboratory and scientific research purposes only. It is not intended for human or veterinary use, diagnosis, treatment, cure, or prevention of disease.»

What Is Selank Peptide?

Selank is a synthetic seven-amino-acid peptide and is commonly described as an analog of the naturally occurring peptide tuftsin. Its short sequence makes it a useful compound for researchers studying peptide chemistry and biological signaling.

The standardized sequence recorded by PubChem and the FDA’s Global Substance Registration System is:

Thr-Lys-Pro-Arg-Pro-Gly-Pro (TKPRPGP).

Research literature has investigated Selank in areas including neurochemical signaling, gene expression, and experimental pharmacology. These studies should not be interpreted as establishing therapeutic effectiveness for a research product.

For laboratory researchers, Selank may be relevant to investigations involving:

• Peptide chemistry
• Neuropeptide research
• Molecular biology
• Neurotransmitter-related pathways
• Structure–activity relationship studies
• Analytical peptide characterization

Molecular Formula, Molecular Weight & Sequence

The core chemical specifications of Selank are:

Property  | Specification
Product name  | Selank Peptide
Peptide type  | Synthetic heptapeptide
Sequence  | TKPRPGP
Full sequence  | H-Thr-Lys-Pro-Arg-Pro-Gly-Pro-OH
Molecular formula  | C₃₃H₅₇N₁₁O₉
Molecular weight  | 751.9 g/mol
CAS number  | 129954-34-3
PubChem CID  | 11765600

These specifications are consistent with the PubChem chemical record and FDA substance registration information.

Why molecular identity matters

A professional research product page should provide the exact chemical form being supplied. Researchers can then compare the product information with HPLC and mass-spectrometry results on the relevant Certificate of Analysis.

It is also important not to confuse standard Selank with N-acetyl Selank, which is a chemically different compound with a different molecular formula and molecular weight.

Purity

A typical research-grade specification can be presented as:

Purity: ≥98% by HPLC

However, the actual purity result should always be taken from the batch-specific Certificate of Analysis (COA) rather than assuming that every batch has exactly the same analytical result.

Depending on the available testing package, quality documentation may include:

• HPLC purity
• Mass spectrometry
• Molecular weight
• Lot or batch number
• Peptide quantity
• Testing date
• Appearance
• Storage information

For researchers, a strong COA should allow the analytical result to be connected directly to the lot number printed on the vial.

Appearance

Appearance: White to off-white lyophilized powder.

Selank Peptide may be supplied in lyophilized form to provide a dry, convenient material for laboratory storage and handling.

Small variations in physical appearance can occur because of manufacturing and drying conditions. Therefore, visual appearance should not be used as the primary method of confirming peptide identity or purity.

HPLC and mass spectrometry are more appropriate analytical tools for evaluating peptide purity and identity.

Available Vial Sizes

For research applications, Selank Peptide can be offered in several quantities depending on laboratory requirements and inventory.

Common research vial sizes include:

• 2 mg
• 5 mg
• 10 mg
• 20 mg
• 50 mg

For many individual research projects, 5 mg and 10 mg formats provide practical quantities for analytical and experimental work.

Larger quantities can be useful for laboratories conducting repeated experiments or requiring material for multiple analytical runs.

Actual availability should always correspond to your current production batches and validated specifications.

Storage Recommendations

Proper storage helps protect the quality of lyophilized peptide material.

For Selank Peptide in lyophilized form:

• Follow the storage temperature specified on the product documentation.
• Keep the vial tightly closed when not in use.
• Protect the material from excessive moisture.
• Minimize unnecessary exposure to heat and direct light.
• Avoid repeated temperature cycling.
• Allow a cold vial to equilibrate appropriately before opening to reduce condensation risk.

For long-term storage, controlled frozen conditions may be appropriate when supported by the manufacturer’s stability information.

Important: Storage requirements can differ between peptide formulations and batches. The batch-specific documentation supplied with the product should take priority.

Reconstitution Information

Selank Peptide is supplied as a lyophilized research material. If a laboratory protocol requires reconstitution, the researcher should select a solvent and final concentration compatible with the intended experiment.

General laboratory considerations include:

1. Allow the sealed vial to reach a suitable temperature before opening.
2. Use an appropriate laboratory-grade solvent.
3. Introduce the solvent carefully.
4. Avoid unnecessarily vigorous agitation.
5. Allow sufficient time for the material to dissolve.
6. Minimize excessive foaming.
7. Prepare aliquots when appropriate to reduce repeated freeze–thaw exposure.
8. Record the solvent, concentration, preparation date, and storage conditions.

There is no single reconstitution volume that is appropriate for every research application. The required volume should be calculated from the concentration required by the laboratory protocol.

For example, researchers should determine the desired concentration first and then calculate the solvent volume required to achieve it.

Intended Use — Research Use Only

Selank Peptide is intended exclusively for laboratory research.

This product should be marketed and labeled as a research chemical and should not be represented as a medicine, dietary supplement, or approved therapeutic product.

It is not intended for human or veterinary administration.

Researchers are responsible for ensuring that their experimental use, handling, storage, and disposal procedures comply with applicable institutional and regulatory requirements.

«Research Use Only. Not for Human or Veterinary Use.»

Packaging & Shipping Information

A professional Selank Peptide package should be designed to protect the lyophilized material during normal transportation.

Depending on the product configuration, packaging may include:

• Securely sealed peptide vial
• Product identification label
• Net peptide quantity
• Lot or batch number
• Research-use-only labeling
• Protective secondary packaging
• Certificate of Analysis or batch documentation, where applicable

Before placing the material into laboratory inventory, researchers should inspect the package and vial for visible damage.

The product name, quantity, lot number, and accompanying documentation should also be checked for consistency.

Shipping conditions should follow the product’s validated storage and stability requirements.

Frequently Asked Questions About Selank Peptide

What is Selank Peptide?

Selank is a synthetic seven-amino-acid peptide with the sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro (TKPRPGP). It has been investigated in experimental neuropeptide and pharmacological research.

What is the sequence of Selank?

The sequence is:

TKPRPGP

The full representation is H-Thr-Lys-Pro-Arg-Pro-Gly-Pro-OH.

What is the molecular formula of Selank?

The molecular formula is:

C₃₃H₅₇N₁₁O₉.

What is the molecular weight of Selank?

Selank has a reported molecular weight of approximately 751.9 g/mol.

What is the CAS number for Selank?

The CAS number listed for Selank is 129954-34-3.

What does Selank Peptide look like?

Research-grade Selank is commonly supplied as a white to off-white lyophilized powder.

What purity should researchers look for?

A suitable research specification may be ≥98% purity by HPLC. Researchers should confirm the actual batch result using the product’s COA.

Should Selank come with a COA?

For professional research supply, batch-specific documentation is highly valuable. Researchers should look for information such as HPLC purity, mass-spectrometry data, molecular weight, lot number, and testing date.

How should Selank be stored?

Follow the storage conditions supplied with the specific batch. Protect the lyophilized material from moisture, excessive heat, light, and unnecessary temperature cycling.

How is Selank reconstituted?

Reconstitution depends on the experimental protocol, desired concentration, solvent compatibility, and intended laboratory application. There is no universal reconstitution volume for every experiment.

Is Selank the same as N-acetyl Selank?

No. N-acetyl Selank is a chemically modified form with a different molecular formula and molecular weight. Researchers should verify the exact chemical form specified on the product documentation.

Is Selank approved for human use?

A research-use-only Selank product should not be presented as an approved human therapeutic. The product should be used only for legitimate laboratory research in accordance with applicable requirements.

Key Takeaway

Selank Peptide is a synthetic heptapeptide with the sequence TKPRPGP, molecular formula C₃₃H₅₇N₁₁O₉, and molecular weight of approximately 751.9 g/mol.

For researchers, the most important factors when selecting Selank are chemical identity, analytical purity, batch documentation, appropriate storage, and clear research-use labeling.

A professional product listing should make it easy for researchers to compare the stated sequence and molecular weight with the analytical information provided for their specific batch.

At OasBioScience, the product page can use this information alongside the applicable batch-specific COA to give researchers a clear and transparent reference point.

Research Use Only. Not for Human or Veterinary Use.

Continue Learning: If you found this guide helpful, you may also want to read our previous peptide education articles covering peptide concentration calculations, peptide storage, and common reconstitution mistakes to improve accuracy and maintain peptide stability during research.

Helpful Topics Below

• What Bacteriostatic Water Should I Use For My Peptide?
• What’s Peptide Reconstitution?
• How Long Do Peptides Last?
• How Should Peptides Be Stored?
• How do I read a COA?
• What Does HPLC Testing Mean?
• Peptide Purity explained in depth

Scientific Reference: For additional peer-reviewed information on peptide stability, sterile preparation, and pharmaceutical reconstitution practices, visit PubMed