Looking for research-grade Selank for sale in the USA? PX1 Research provides analytical-grade Selank peptide synthesized in domestic GMP-compliant facilities, complete with lot-specific third-party certificates of analysis, HPLC/MS purity testing above 99%, and quantitative endotoxin screening strictly for laboratory in vitro and animal research protocols.
Looking for research-grade Selank for sale in the USA? PX1 Research provides analytical-grade Selank peptide synthesized in domestic GMP-compliant facilities, complete with lot-specific third-party certificates of analysis, HPLC/MS purity testing above 99%, and quantitative endotoxin screening strictly for laboratory in vitro and animal research protocols.
When purchasing research-grade Selank peptide within the United States, laboratory researchers require fully documented analytical purity, chemical identity verification, and strict batch-to-batch consistency. Selank (Thr-Lys-Pro-Arg-Pro-Gly-Pro) is a synthetic heptapeptide derived from the naturally occurring human immunomodulatory peptide tuftsin, modified to extend enzymatic stability and modulate central nervous system pathways in experimental models.
Due to its specialized peptide sequence, sourcing reliable material for preclinical investigation requires domestic manufacturing oversight. PX1 Research delivers USA-synthesized peptides supported by ISO 17025 accredited laboratory testing. Every batch undergoes rigorous High-Performance Liquid Chromatography (RP-HPLC) and Mass Spectrometry (MS) to confirm identity and peptide purity exceeding standard industry thresholds, ensuring reproducible experimental outcomes across all research environments.
Selank is a synthetic heptapeptide sequence structured as Thr-Lys-Pro-Arg-Pro-Gly-Pro. It represents a rational drug design modification of the tetrapeptide tuftsin (Thr-Lys-Pro-Arg), an endogenous immunomodulatory fragment of the heavy chain of human Immunoglobulin G (IgG). By appending a C-terminal Pro-Gly-Pro tripeptide sequence, researchers significantly altered the molecular stability of the native peptide.
In native biological matrices, linear tetrapeptides like tuftsin are rapidly degraded by serum peptidases, yielding an extremely short biological half-life. The addition of the Pro-Gly-Pro cassette confers resistance to aminopeptidases and carboxypeptidases. This structural reinforcement allows Selank to maintain structural integrity during extended incubation periods in *in vitro* enzymatic assays and preclinical *in vivo* tissue evaluations.
Preclinical studies indicate that Selank exerts its principal neurochemical effects by modulating the gamma-aminobutyric acid (GABA) ergic system and altering monoamine neurotransmitter turnover. In rodent models, exposure to Selank alters the binding affinity of GABA receptors without functioning as a direct GABA-A receptor agonist, suggesting an allosteric modulatory role that differs fundamentally from traditional classic benzodiazepines.
Furthermore, *in vitro* transcription assays demonstrate that Selank influences gene expression profiles associated with brain-derived neurotrophic factor (BDNF) and its receptor TrkB in hippocampus tissues. Researchers also report that Selank regulates the degradation rate of endogenous enkephalins by inhibiting specific peptidases, thereby prolonging endogenous opioid peptide signalling in neural tissue cultures. Detailed mechanistic studies can be explored further in our peptide research library.
The scientific literature surrounding Selank focuses heavily on its dual anxiolytic-like and cognitive-modulating properties observed in animal models. In standard rodent behavioral assays, such as the elevated plus-maze and open-field tests, administration of Selank consistently attenuated stress-induced behavioral suppression without inducing the sedation, ataxia, or muscle relaxation typically observed with classic GABAergic agents.
In addition to stress-response research, preclinical investigations have evaluated Selank in learning and memory paradigms. Rodents subjected to active avoidance and spatial navigation tasks exhibited enhanced acquisition rates and consolidated memory retention under acute stress conditions. Gene expression profiling reveals that Selank rapidly alters the transcription of cytokines and neurotrophin receptors in the cerebral cortex, offering a potential molecular explanation for its observed neuroprotective and nootropic research phenomena.
When designing neurochemical or immunomodulatory research protocols, investigators frequently compare Selank to related regulatory peptides. The primary comparison involves Semax research insights, an ACTH(4-10) analog share-designed with a C-terminal Pro-Gly-Pro sequence. While Semax predominantly targets the melanocortin system, BDNF expression, and dopaminergic neurotransmission, Selank exhibits stronger modulation of GABAergic and enkephalinergic pathways.
Comparing these compounds against native Tuftsin derivative research highlights the dramatic stability advantages conferred by the Pro-Gly-Pro addition. Investigators seeking modified variants may also utilize N-acetyl Selank amidate, an acetylated and amidated derivative evaluated for altered lipophilicity and resistance to degradation. Researchers interested in broader regulatory peptide mechanisms can inspect our comprehensive catalog of research peptides for structural comparisons.
Proper handling and storage of lyophilized Selank are critical to maintaining structural stability and preventing hydrolytic degradation. Upon receipt, lyophilized peptide vials should be stored at -20°C or -80°C for long-term preservation. Exposure to ambient room temperature during transport is acceptable for short periods, but long-term exposure to heat and light will compromise peptide bond integrity.
For laboratory reconstitution, researchers should utilize bacteriostatic water or sterile phosphate-buffered saline (PBS, pH 7.4) under a laminar flow hood. Gently direct the diluent down the glass vial wall rather than directly onto the lyophilized cake to minimize shear stress. Avoid agitation or vortexing; allow the cake to dissolve naturally via gentle rotation. Post-reconstitution, liquid aliquots must be stored at 2°C to 8°C for short-term use (under 14 days) or frozen at -80°C to prevent freeze-thaw degradation cycles.
The presence of truncated peptide fragments, residual coupling reagents, or endotoxins can severely artifact experimental data in cell cultures and animal models. High-Performance Liquid Chromatography (RP-HPLC) isolates the main target peptide peak from impurities, verifying high chemical purity. PX1 Research mandates that every lot of Selank exhibits an RP-HPLC purity score exceeding 99.0%.
Complementary to HPLC, Electrospray Ionization Mass Spectrometry (ESI-MS) confirms the exact molecular weight (851.96 Da) and sequence integrity of the synthetic peptide. Furthermore, because bacterial lipopolysaccharides (LPS) trigger inflammatory responses in cellular assays, every lot undergoes chromogenic Limulus Amebocyte Lysate (LAL) testing to guarantee endotoxin levels remain strictly below <0.01 EU/mg, as documented in our transparent HPLC purity testing standards.
Sourcing Selank for domestic USA laboratories requires absolute confidence in supplier supply chains. Overseas vendors often fail to provide verifiable certificates of analysis or offer batches containing uncharacterized impurities, inconsistent TFA (trifluoroacetic acid) counter-ion levels, or elevated endotoxin concentrations. PX1 Research operates fully within domestic USA manufacturing frameworks to eliminate these risks.
Every batch of Selank sold by PX1 Research originates from ISO 17025 accredited and GMP-compliant facilities located in the United States. Operations out of primary distribution facilities in California and Arizona ensure rapid order processing and same-day dispatch (Monday through Friday). Laboratory accounts gain immediate access to lot-specific, downloadable COAs verifying identity, purity, and safety assays prior to experiment commencement.
High-throughput screening laboratories, academic institutions, and contract research organizations (CROs) frequently require multi-gram quantities or custom packaging configurations of Selank. Establishing reliable supply channels with consistent counter-ion content and uniform batch characteristics is essential for longitudinal studies lasting months or years.
PX1 Research supports institutional supply requirements through dedicated wholesale laboratory accounts. Institutional buyers benefit from volume tiering, reserved lot allocation for longitudinal consistency, and direct communication with analytical chemists to support custom specifications or specialized analytical documentation.
What is the certified chemical purity of PX1 Research Selank?
Every lot of Selank provided by PX1 Research is certified to meet or exceed 99.0% purity as determined by Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) and confirmed by Mass Spectrometry (MS).
How is Selank shipped to maintain peptide stability?
Selank is supplied as a lyophilized (freeze-dried) powder, which provides high temperature stability during transit. PX1 Research dispatches orders same-day (M–F) from facilities in California and Arizona using fast, secure shipping protocols.
Is a Certificate of Analysis (COA) included with my order?
Yes. Every individual lot of Selank is accompanied by a downloadable, lot-specific COA verified by an independent, third-party ISO 17025 accredited testing laboratory.
What are the recommended reconstitution procedures for laboratory use?
Reconstitution should occur in a sterile environment using bacteriostatic water or sterile saline. The solvent should be introduced gently against the vial wall and allowed to dissolve without vigorous vortexing.
What is the endotoxin limit for PX1 Research peptides?
All research peptides, including Selank, are quantitatively tested for bacterial endotoxins using LAL assays, guaranteeing levels remain below <0.01 EU/mg to prevent immune activation in preclinical research.
Can Selank be used for human consumption or clinical applications?
No. All products offered by PX1 Research, including Selank, are strictly for in vitro laboratory research and preclinical animal experimentation. They are explicitly not for human use, clinical administration, or therapeutic application.
What is the molecular weight and chemical formula of Selank?
Selank has a chemical formula of C33H57N11O9 and a theoretical molecular weight of approximately 851.96 g/mol.
How should reconstituted Selank be stored in the laboratory?
Once reconstituted into solution, Selank should be stored at 2°C to 8°C for immediate short-term use or aliquoted and stored at -80°C for long-term storage to prevent peptide hydrolysis.
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.