PX1 Research provides academic and institutional laboratories with ultra-pure, synthetic Selank for preclinical investigation. Manufactured in compliance with rigorous quality standards, every batch undergoes independent third-party analytical testing to guarantee exact sequence identity, chemical purity, and low endotoxin levels.
PX1 Research provides academic and institutional laboratories with ultra-pure, synthetic Selank for preclinical investigation. Manufactured in compliance with rigorous quality standards, every batch undergoes independent third-party analytical testing to guarantee exact sequence identity, chemical purity, and low endotoxin levels.
Institutional researchers seeking to buy Selank research peptide require analytical-grade material characterized by verified chemical purity and batch-to-batch consistency. PX1 Research supplies USA-manufactured Selank (Thr-Lys-Pro-Arg-Pro-Gly-Pro) with complete third-party High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS) documentation, ensuring greater than 98% peptide purity for reliable in vitro and preclinical experimental models.
When purchasing compounds for cellular or animal model assays, variance in synthesis quality or the presence of residual trifluoroacetic acid (TFA), organic solvents, or bacterial endotoxins can confound experimental outcomes. PX1 Research mitigates these experimental variables by subjecting every production lot of Selank to rigorous analytical testing in ISO 17025 accredited testing facilities.
Researchers evaluating neurochemical signaling pathways, immunomodulatory peptide cascades, or enzymatic stability mechanisms can access fully documented research compounds directly through our PX1 research catalog. All shipments originate from our central facilities in California and Arizona, backed by same-day dispatch for orders finalized before standard operational cut-off times.
Selank is a synthetic heptapeptide derived from the naturally occurring immunomodulatory tetrapeptide tuftsin (Thr-Lys-Pro-Arg). To overcome the rapid enzymatic degradation that limits native tuftsin in biological assays, molecular designers extended the C-terminus with a tripeptide sequence (Pro-Gly-Pro). The resulting sequence—Thr-Lys-Pro-Arg-Pro-Gly-Pro—exhibits significantly prolonged metabolic stability in plasma and tissue homogenates while preserving interaction with target receptor complexes.
The molecular weight of reference Selank is approximately 751.9 g/mol. The inclusion of the C-terminal Pro-Gly-Pro motif protects the central peptide bonds against endogenous carboxypeptidases and aminopeptidases. In biochemical literature, this structural modification is studied for its ability to extend the compound's half-life in physiological buffers without altering its primary receptor affinity dynamics.
Understanding these structural modifications allows investigators using our peptide research hub to design robust assay protocols. Whether assessing peptide degradation kinetics or evaluating structural interactions with cellular membranes, high-purity Selank serves as a baseline standard for synthetic tuftsin derivatives.
Preclinical literature demonstrates that Selank interacts with multiple neurochemical systems, distinct from classic pharmacological agents. Unlike direct GABA-A receptor agonists, in vitro electrophysiological studies indicate that Selank modulates gamma-aminobutyric acid (GABA) signaling via allosteric mechanisms. Researchers examining radiolabeled ligand binding have noted that Selank alters the affinity of GABA-A receptor complexes for endogenous substrates without binding directly to the primary benzodiazepine site.
In addition to GABAergic modulation, animal model studies reveal that Selank administration influences the expression of Brain-Derived Neurotrophic Factor (BDNF) and its primary tyrosine kinase receptor, TrkB, within the hippocampus. Quantitative RT-PCR analysis in rodent models demonstrates transient up-regulation of BDNF mRNA following peptide exposure, suggesting potential downstream pathways involved in neuronal plasticity and neuroprotection.
A third established mechanism involves the regulation of endogenous peptide metabolism. In vitro enzymatic assays show that Selank inhibits enkephalin-degrading enzymes, such as neutral endopeptidase (NEP) and aminopeptidase N (APN). By slowing down the cleavage of endogenous enkephalins, Selank indirectly modulates opioid peptide concentrations in cerebrospinal fluid and plasma models.
Investigative research on Selank spans both neurobiological and immunological domains. In rodent behavioral models—such as the elevated plus maze, open field test, and passive avoidance paradigms—researchers have evaluated the compound's capacity to alter anxiety-like behavior and cognitive retention parameters. These preclinical evaluations typically measure changes in exploratory behavior, locomotion, and stress-induced biomarker fluctuations.
At the cellular level, in vitro investigations involving peripheral blood mononuclear cells (PBMCs) and murine splenocyte cultures demonstrate that Selank influences cytokine expression profiles. Preclinical studies suggest that the heptapeptide alters the transcription and secretion of interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α), reinforcing its structural heritage as an immunomodulating tuftsin analog.
Furthermore, comparative genomic studies examining rodent brain tissue following peptide application have identified altered transcriptional activity across dozens of genes involved in neurotransmission, ion channel regulation, and extracellular matrix remodeling. These broad genomic actions highlight Selank's utility as a multifaceted probe in central nervous system research.
When designing neurobiological research protocols, investigators often evaluate Selank alongside other synthetic regulatory peptides. A common comparison is made with the Semax research peptide, another Russian-developed heptapeptide. While Selank is derived from the immunomodulatory fragment tuftsin, Semax is an ACTH(4-10) analog (Met-Glu-His-Phe-Pro-Gly-Pro). Consequently, Semax research primary focuses on melanocortin receptor interaction, neurotrophic factor stimulation, and ischemic injury models, whereas Selank studies emphasize GABAergic allosteric modulation and enkephalinase inhibition.
Another relevant class of comparison involves structural immunomodulators such as synthetic tuftsin analogs. While native tuftsin exhibits a rapid biological half-life measured in minutes, Selank's Pro-Gly-Pro extension grants significantly higher resistance to enzymatic cleavage in vitro. For comparative tissue regeneration or systemic resilience models, investigators may also contrast Selank's central signaling pathways against systemic repair probes such as the BPC-157 research peptide.
The following matrix summarizes key structural and mechanistic distinctions among these primary research compounds:
To maintain structural integrity and prevent hydrolytic degradation, Selank is supplied by PX1 Research as a lyophilized (freeze-dried) cake or powder inside vacuum-sealed glass vials. Lyophilized peptides should be stored upon receipt in a freezer at -20°C or -80°C for long-term stability, shielded from light exposure.
Reconstitution should be conducted under aseptic conditions using an appropriate laboratory solvent, such as sterile bacteriostatic water (0.9% benzyl alcohol) or sterile phosphate-buffered saline (PBS, pH 7.4), depending on the requirements of the downstream assay. Warm vials to room temperature before adding the diluent to avoid moisture condensation inside the vial.
When introducing solvent, direct the liquid stream down the inner glass wall of the vial rather than directly onto the lyophilized pellet. Gentle swirly or passive dissolution is recommended; mechanical agitation, vigorous shaking, or vortexing must be avoided to prevent shear stress and peptide denaturation. Once reconstituted, liquid aliquots should be used immediately or stored at 4°C for short-term evaluation (up to 7-14 days) or stored in single-use sub-aliquots at -20°C to minimize freeze-thaw cycles.
PX1 Research maintains a rigorous quality control paradigm for every lot of Selank distributed to the research community. Purity verification begins with High-Performance Liquid Chromatography (HPLC), which separates chemical species within the sample to calculate the relative area percentage of the target heptapeptide peak. We mandate a minimum purity threshold of ≥98.0% for all catalog compounds.
Mass Spectrometry (MS) is simultaneously performed to confirm exact molecular identity. By measuring the mass-to-charge ratio (m/z), MS analysis verifies that the synthetic sequence matches the theoretical mass of 751.9 g/mol without unwanted sequence truncation, deletion sequences, or persistent protecting groups.
In addition to analytical purity, biological safety assays are essential for cellular and animal model consistency. PX1 conducts Limulus Amebocyte Lysate (LAL) testing on every batch to ensure endotoxin levels remain strictly below <0.5 EU/mg. Every purchase includes access to a lot-specific Certificate of Analysis (COA) directly verifiable against our analytical databases.
Academic laboratories, contract research organizations (CROs), and biotechnology firms require reliable supply chain continuity. PX1 Research facilitates seamless procurement with dedicated account options for volume inquiries via our wholesale lab accounts portal.
All PX1 products are synthesized in state-of-the-art facilities compliant with Good Manufacturing Practice (GMP) standards, ensuring strict process controls, environmental monitoring, and equipment validation. Orders are packaged in specialized climate-controlled containers to prevent temperature degradation during transit.
By sourcing directly from a USA-based supplier with dual shipping facilities in California and Arizona, researchers avoid international customs delays, import tariffs, and unverified secondary distribution networks. Explore our full range of laboratory reagents and reference compounds by visiting the PX1 research catalog.
What is the primary chemical structure of Selank?
Selank is a synthetic heptapeptide with the amino acid sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro. It consists of the naturally occurring immunomodulating peptide tuftsin appended with a C-terminal Pro-Gly-Pro tripeptide to enhance enzymatic stability.
How does PX1 Research verify the purity of Selank?
Every lot of Selank undergoes independent third-party testing utilizing High-Performance Liquid Chromatography (HPLC) to verify chemical purity (≥98%) and Mass Spectrometry (MS) to confirm exact molecular weight. Lot-specific COAs are available for every shipment.
Is Selank approved for human consumption or therapeutic use?
No. Selank supplied by PX1 Research is strictly designated as a research compound for in vitro assays, laboratory investigation, and preclinical research. It is not for human or animal therapeutic, clinical, or diagnostic use.
What solvent is recommended for reconstituting Selank in laboratory assays?
Reconstitution depends on assay design. Standard sterile bacteriostatic water (0.9% benzyl alcohol) or sterile phosphate-buffered saline (PBS, pH 7.4) are commonly used. Swirl gently without vortexing to ensure complete dissolution.
What are the storage requirements for lyophilized Selank?
Lyophilized Selank should be stored at -20°C or -80°C upon receipt to maintain long-term stability. Protect the vial from light and excessive humidity.
How does Selank differ from Semax in preclinical research models?
While both are Russian-developed heptapeptides featuring a Pro-Gly-Pro tail, Selank is derived from tuftsin and modulates GABAergic and enkephalinase pathways. Semax is an ACTH(4-10) derivative that interacts with melanocortin receptors and neurotrophin pathways.
What is the endotoxin limit for PX1 Research Selank?
PX1 Research enforces strict endotoxin controls, ensuring all research peptides test below <0.5 EU/mg via Limulus Amebocyte Lysate (LAL) testing to prevent cellular toxicity in sensitive assays.
Can institutions request bulk quantities for ongoing studies?
Yes. Institutional buyers and academic laboratories can request custom lot sizes, bulk quantities, and specialized packaging configurations through our wholesale lab accounts service.
All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.