Selank is a synthetic peptide studied in laboratory research focused on neurological signaling, cognitive processes, stress response, and immune system pathways.
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NA-Selank Product Overview NA-Selank is a synthetic, N-terminally acetylated derivative of Selank supplied as 10mg of lyophilized research material in a single vial. Selank is a seven-amino-acid peptide derived from the tuftsin sequence Thr-Lys-Pro-Arg, extended at the C-terminus with Pro-Gly-Pro. NA-Selank retains this seven-residue core while incorporating an acetyl group at the N-terminus. Product Specifications Product name: NA-Selank Common expanded name: N-acetyl Selank Amount: 10mg Core sequence: Thr-Lys-Pro-Arg-Pro-Gly-Pro One-letter sequence: TKPRPGP Sequence length: 7 amino acids Declared modification: N-terminal acetylation Format: Lyophilized material Container: Single vial Relationship to Tuftsin and Selank Tuftsin is a naturally occurring tetrapeptide with the sequence Thr-Lys-Pro-Arg. Selank is a synthetic analogue that combines this tuftsin-derived sequence with the tripeptide Pro-Gly-Pro. NA-Selank is a further modified research analogue in which the free N-terminal amine is acetylated. This structural modification makes NA-Selank chemically distinct from both tuftsin and unmodified Selank. N-Terminal Acetylation N-terminal acetylation blocks the free amino group at the beginning of the peptide chain. In peptide chemistry, this modification can affect molecular charge, susceptibility to aminopeptidases and behaviour in biological matrices. The effect of acetylation must be established under the conditions of the individual experiment. It should not be assumed to provide a specific degree of stability, biological activity or tissue penetration without supporting analytical data. Selank Research Background Published research involving the parent peptide Selank has examined GABA-related signalling, neurotransmission-associated gene expression, hippocampal BDNF expression, behavioural models and the expression of genes involved in cytokine and inflammatory pathways. These findings were produced using particular cellular, animal or experimental systems. Proposed mechanisms remain model-dependent and should not be presented as universal properties of Selank. Evidence Specific to NA-Selank Most peer-reviewed Selank literature concerns the unmodified TKPRPGP peptide rather than N-acetyl Selank. Findings obtained with ordinary Selank cannot automatically be attributed to NA-Selank because terminal modification can alter the peptide’s physicochemical and experimental behaviour. Direct comparison of NA-Selank with unmodified Selank is therefore an important research question rather than an established equivalence. Potential Research Areas Comparative analysis of NA-Selank and unmodified Selank Peptide stability and degradation assays Aminopeptidase-resistance studies GABA-related cellular signalling models Neurotransmission-associated gene-expression research BDNF-expression models Tuftsin-derived peptide comparisons Cytokine and inflammatory gene-expression assays Cellular stress-response studies Structure–activity relationship research Analytical identity, purity and content testing Important Structural Distinction The terms “NA-Selank” and “N-acetyl Selank” are not used consistently across the research-material market. Some suppliers use them for N-acetyl Selank with a free C-terminal carboxyl group, while others use them for N-acetyl Selank amidate with a C-terminal amide. These are different chemical structures: N-acetyl Selank free acid: Ac-TKPRPGP-OH N-acetyl Selank amidate: Ac-TKPRPGP-NH2 Because the terminal form affects the molecular formula and calculated molecular mass, researchers should verify the complete sequence, terminal chemistry, salt form and expected mass in the documentation for the individual Nuforme batch. A CAS number should not be assigned unless it corresponds to the exact confirmed structure. Analytical Considerations Mass spectrometry can be used to compare the measured molecular mass with the value calculated for the declared terminal structure. HPLC or UPLC can examine chromatographic purity and related impurities, while a separate quantitative method is required to determine the amount of peptide present in the vial. Chromatographic purity does not establish peptide content. Relevant analytical considerations can include truncated or deletion sequences, incomplete acetylation, terminal-form mismatches, oxidation, deamidation, aggregation, residual water and counterion content. Researchers should consult the batch-specific certificate of analysis when confirming identity, purity, peptide content and analytical methods. Evidence Limitations Research involving Selank and related analogues includes cell-based, animal and limited human studies. Published findings concerning ordinary Selank do not establish that NA-Selank has the same activity, stability, safety profile or experimental effects. This material should not be described as proven to reduce anxiety, improve mood, enhance memory, increase concentration or treat neurological, psychiatric or immune-related conditions. Storage and Handling Store the unopened vial according to the conditions stated on the product label and applicable batch documentation. Keep the material sealed and protected from light, heat and moisture. Laboratory preparation, handling and disposal should follow an approved institutional protocol. For laboratory research only. Not for human consumption or veterinary use. This product is not a drug, medication, supplement or cosmetic and is not intended to diagnose, treat, cure or prevent any disease.
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