Selank is a synthetic regulatory heptapeptide derived from the naturally occurring immunomodulating peptide tuftsin. Investigated extensively in preclinical neurochemical and immunological models, Selank modulates GABAergic neurotransmission, monoamine metabolism, and cytokine expression. PX1 Research provides high purity Selank research peptide as a validated laboratory reference standard for in vitro and animal research applications.
Selank is a synthetic regulatory heptapeptide derived from the naturally occurring immunomodulating peptide tuftsin. Investigated extensively in preclinical neurochemical and immunological models, Selank modulates GABAergic neurotransmission, monoamine metabolism, and cytokine expression. PX1 Research provides high purity Selank research peptide as a validated laboratory reference standard for in vitro and animal research applications.
When purchasing compounds for preclinical investigation, choosing a reliable selank peptide vendor requires verifying strict analytical standards. Researchers looking to buy selank research peptide must ensure their supplier provides fully transparent analytical data, including lot-specific HPLC chromatograms and mass spectrometry identity verification. PX1 Research supplies high purity selank lyophilized powder manufactured in GMP-compliant USA facilities, ensuring that every batch meets rigorous research-grade specifications.
Investigators who buy selank from PX1 Research receive reagents tested by accredited ISO 17025 independent laboratories. Whether conducting baseline receptor binding assays, gene expression profiling, or behavioral animal models, securing fully characterized reference materials is essential for reproducibility and data integrity across experimental cohorts.
Selank is a synthetic derivative of the human immunomodulatory tetrapeptide tuftsin (Thr-Lys-Pro-Arg), extended at the C-terminus by a Pro-Gly-Pro tripeptide motif (sequence: Thr-Lys-Pro-Arg-Pro-Gly-Pro). This structural modification significantly enhances metabolic stability against circulating peptidases compared to native tuftsin while retaining biological activity in central and peripheral targets.
In analytical assays, native Selank presents a molecular weight of approximately 751.9 g/mol. Modifications such as C-terminal amidation (Selank Amidate) or N-terminal acetylation (N-Acetyl Selank) alter the peptide's iso-electric point and lipophilicity, which investigators evaluate in specialized blood-brain barrier transport models. Researchers exploring these structural variants can view our full catalog of research peptides to compare modified sequence stability.
Preclinical literature demonstrates that Selank exerts complex regulatory effects on central neurotransmitter systems without direct agonist activity at classic benzodiazepine binding sites. In vitro electrophysiological studies indicate that Selank acts as an allosteric modulator of GABA_A receptors, enhancing chloride conductance in response to endogenous GABA binding. This mechanism is routinely evaluated in neurochemical models investigating anxiety-like behavior and stress response pathways.
Furthermore, rodent models show that administration of Selank alters monoamine metabolism, specifically modulating serotonin (5-HT) and dopamine turnover in the hippocampus and prefrontal cortex. Preclinical studies suggest that Selank upregulation of brain-derived neurotrophic factor (BDNF) mRNA expression in neuronal cell cultures may support neuroprotective and synaptic plasticity mechanisms. To learn more about how related neuropeptides influence neurotrophic factors, consult our research library hub.
Beyond its neurochemical profile, Selank retains the immunomodulatory characteristics of its parent peptide, tuftsin. In vitro assays using rodent splenocytes and peripheral blood mononuclear cells (PBMCs) demonstrate that Selank influences gene expression profiles for inflammatory and regulatory cytokines, including IL-6, TNF-alpha, and IL-10.
Investigators evaluating immunopeptides study Selank's ability to modulate neutrophil phagocytic activity and restore cytokine equilibrium under induced inflammatory stress. Research groups interested in structural homologues involved in immune signaling can explore comparative mechanisms detailed in our article on tuftsin analogs in immunology.
Achieving high purity selank is critical for preventing confounding baseline signals in sensitive cell culture or enzymatic assays. Standard synthesis protocols must be followed by multi-step reverse-phase high-performance liquid chromatography (RP-HPLC) purification to isolate the target sequence from truncated peptide fragments or protecting group ad-ducts.
A rigorous selank hplc assay establishes both overall purity percentages and specific single-impurity limits. For high purity selank intended for reference applications, total peptide purity must exceed 98.0%, with no single unidentified impurity exceeding 0.5%. Electrospray ionization mass spectrometry (ESI-MS) is performed alongside HPLC to confirm exact molecular mass and verify the absence of residual counterions or organic solvents.
Assuring analytical integrity requires verifying that your selank supplier conducts independent, third-party laboratory verification for every lot manufactured. PX1 Research mandates that every batch of native Selank and modified variants—such as selank amidate third party tested stock—undergoes rigorous screening prior to release.
Every shipment includes a accessible Certificate of Analysis (COA) detailing RP-HPLC purity profiles, mass spectrometry mass verification, moisture content (Karl Fischer titration), and quantitative bacterial endotoxin testing via Limulus Amebocyte Lysate (LAL) assay. Maintaining endotoxin levels below 0.5 EU/mg ensures suitability for sensitive cell-based and in vivo laboratory protocols.
Selank is supplied as a sterile, lyophilized white powder to maximize shelf stability during transit and storage. Upon receipt, sealed vials should be stored at -20°C or -80°C in a dry environment protected from light. Lyophilized cake stability is maintained under these conditions for up to 24 months.
Reconstitution should be performed under aseptic laboratory conditions using sterile bacteriostatic water or phosphate-buffered saline (PBS, pH 7.4), depending on experimental requirements. After solvent addition, gently swirl the vial without aggressive vortexing to prevent peptide denaturation. Aliquot reconstituted solutions into single-use polypropylene tubes and freeze at -20°C to avoid repeated freeze-thaw cycles. Detailed volumetric step-by-step guidance is available via our peptide reconstitution calculator.
In neurobiological research, Selank is frequently evaluated alongside other synthetic regulatory peptides, notably Semax. While both compounds originate from regulatory peptide fragments—Selank from tuftsin and Semax from ACTH(4-10)—their primary molecular pathways differ. Semax predominantly influences melanocortin receptor signaling and neurotrophin pathways, whereas Selank demonstrates pronounced GABAergic allosteric modulation and cytokine regulation.
Researchers comparing these compounds often utilize Semax peptide and N-Acetyl Selank Amidate concurrently to evaluate differential effects on cognitive paradigms and stress response models in rodents. For an in-depth breakdown of head-to-head preclinical data, reference our comprehensive guide on Semax vs Selank.
PX1 Research serves as a premier selank supplier for university research laboratories, biotechnology firms, and institutional procurement departments across the United States. When ordering selank powder for sale from PX1 Research, researchers gain access to fully traceable, USA-manufactured reagents produced under strict quality control standards.
We support both small-scale screening projects and high-throughput research programs. Facilities requiring recurring volume orders or customized vial fills can set up dedicated accounts through our wholesale program. All orders dispatch same-day Monday through Friday from our primary fulfillment centers in California and Arizona.
What should research institutions verify when choosing a selank peptide vendor?
Institutions should verify that the selank peptide vendor provides lot-specific Certificates of Analysis (COAs) from accredited ISO 17025 third-party laboratories. COAs must confirm peptide identity via electrospray ionization mass spectrometry (ESI-MS), quantify purity using high-performance liquid chromatography (RP-HPLC), and document acceptable endotoxin levels (<0.5 EU/mg).
How is high purity selank validated via RP-HPLC and mass spectrometry?
High purity selank is validated by RP-HPLC, which separates the primary peptide sequence from synthesis byproducts to establish an overall purity percentage (ideally >98%). ESI-MS or MALDI-TOF mass spectrometry measures the exact mass-to-charge ratio of the molecule to confirm sequence identity against its theoretical molecular weight (751.9 g/mol).
Why is selank amidate third party tested COA data critical for cell culture assays?
Third-party COA data confirms the absence of cytotoxic manufacturing contaminants, organic solvents, and bacterial endotoxins. For selank amidate third party tested compounds, verifying low endotoxin status (<0.5 EU/mg) ensures that cellular responses in immune or neuronal cultures are caused by the peptide rather than lipopolysaccharide (LPS) contamination.
Where can qualified laboratories buy selank research peptide for in vitro studies?
Qualified research institutions can buy selank research peptide directly from PX1 Research. All batches are manufactured in GMP-compliant USA facilities, third-party tested, and shipped same-day M–F from fulfillment locations in California and Arizona exclusively for in vitro and laboratory research use.
What is the chemical difference between native Selank powder for sale and N-acetylated variants?
Native Selank powder for sale possesses an unmodified N-terminal threonine and C-terminal proline (Thr-Lys-Pro-Arg-Pro-Gly-Pro). N-acetylated or amidated variants (such as N-Acetyl Selank Amidate) include chemical modifications at the peptide terminals designed to alter enzymatic cleavage rates, lipophilicity, and charge in specialized degradation assays.
How should lyophilized Selank reference standards be stored to maintain peptide stability?
Lyophilized Selank reference standards should be stored at -20°C or -80°C in a desiccated environment protected from light. Under these conditions, the powder remains stable for up to 24 months. Reconstituted liquid aliquots should be frozen at -20°C to avoid repeated freeze-thaw cycles.
What endotoxin limits are acceptable for Selank reference materials in immunological assays?
For immunological and cell culture research, endotoxin levels should ideally fall below 0.5 EU/mg as measured by the Limulus Amebocyte Lysate (LAL) assay. PX1 Research screens every lot to ensure endotoxin compliance for sensitive bioassays.
How does Selank compare to Semax in preclinical neuropeptide research?
In preclinical models, Selank acts primarily as a tuftsin-derived modulator of GABAergic transmission and cytokine balance. Semax is derived from ACTH(4-10) and primarily influences melanocortin receptors, BDNF expression, and cholinergic pathways. Both are evaluated for distinct aspects of neuroprotection and central nervous system signaling.
What reconstitution diluents are recommended for Selank in laboratory settings?
Sterile bacteriostatic water (0.9% benzyl alcohol) or sterile phosphate-buffered saline (PBS, pH 7.4) are standard diluents for laboratory reconstitution. Buffer choice depends on whether the solution will be used immediately in cell culture or stored for short-term benchtop experimentation.
What shipping protocols does PX1 Research utilize for domestic research orders?
PX1 Research dispatches domestic orders same-day Monday through Friday when placed before cutoff times. Shipments originate from temperature-controlled facilities in California and Arizona, utilizing protective packaging to safeguard lyophilized peptide integrity during transit.
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.