PX1 Research supplies analytical-grade Semax peptide synthesized to high purity standards for qualified academic, clinical, and industrial laboratories. Every batch undergoes rigorous RP-HPLC and mass spectrometry testing to guarantee consistent primary sequence integrity and baseline purity for in vitro and preclinical research applications.
PX1 Research supplies analytical-grade Semax peptide synthesized to high purity standards for qualified academic, clinical, and industrial laboratories. Every batch undergoes rigorous RP-HPLC and mass spectrometry testing to guarantee consistent primary sequence integrity and baseline purity for in vitro and preclinical research applications.
When purchasing high-purity Semax peptide for laboratory investigations, researchers require absolute structural fidelity, confirmed molecular mass, and minimal baseline endotoxin contamination. PX1 Research manufactures research-grade heptapeptides strictly for in vitro assays, cellular cultures, and animal models. Every lot is produced in US-based GMP-compliant facilities and verified via independent ISO 17025 accredited testing laboratories.
Investigators evaluating central nervous system signaling pathways, neuroplasticity markers, and neuropeptide degradation kinetics depend on standardized peptide sequences. Lower-grade synthetic peptides often contain unreacted amino acid fragments, residual trifluoroacetic acid (TFA), or bacterial endotoxins that invalidate controlled assay metrics. PX1 Research delivers fully documented reference materials accompanied by lot-specific Certificates of Analysis (COAs) to ensure reproducibility across all experimental workflows.
Semax is a synthetic heptapeptide derived from a fragment of adrenocorticotropic hormone, specifically ACTH(4-10), modified with a C-terminal Pro-Gly-Pro tripeptide motif. Its primary amino acid sequence is Met-Glu-His-Phe-Pro-Gly-Pro. The addition of the C-terminal tripeptide sequence significantly increases the peptide's metabolic stability against endogenous aminopeptidases and carboxypeptidases compared to native ACTH fragments.
With a molecular formula of C37H51N9O10S and a molecular weight of approximately 813.92 g/mol, Semax exhibits hydrophilic properties favorable for aqueous reconstitution in non-buffered or buffered saline solutions. The structural modification preserves key signaling pharmacophores while extending peptide half-life in physiological media, making it an ideal candidate for evaluating neuropeptide stability and receptor interactions in preclinical research.
In vitro and animal models have revealed several pathways through which Semax modulates central tissue signaling. Primary among these is the upregulated transcription and expression of neurotrophic factors, specifically Brain-Derived Neurotrophic Factor (BDNF) and Nerve Growth Factor (NGF), along with their corresponding receptor tyrosine kinases (TrkB and TrkA). Preclinical rodent studies demonstrate a rapid increase in hippocampal and cortical BDNF mRNA expression following peptide exposure.
Furthermore, investigations into neurovascular regulatory mechanisms indicate that Semax influences the expression of genes governing vascular endothelial growth factor (VEGF) and cellular adhesion molecules. In rodent stroke and cerebral ischemia models, research indicates that Semax attenuates inflammatory signaling cascades by modulating interleukin expression and reducing local oxidative stress metrics. These observations highlight its broad utility in neuroprotection and vascular research.
Beyond neurotrophic factor induction, preclinical evidence demonstrates that Semax interacts with monoaminergic neurotransmitter networks. In vivo murine studies indicate that the peptide alters striatal dopamine and serotonin turnover rates, particularly under conditions of acute environmental or metabolic stress. Researchers frequently utilize Semax to study the baseline regulation of dopaminergic pathways without direct agonist binding at primary dopamine receptors.
In addition, experimental models assessing cholinergic function have observed that Semax helps preserve acetylcholinesterase activity and cholinergic signaling under hypoxic conditions. For comprehensive investigations into neuropeptide-mediated neuroprotection, scientists frequently compare Semax alongside related analogs like Selank and other melanocortin-derived fragments within comparative assay protocols available in our research library.
Understanding structural and functional differences among synthetic neuropeptides is vital when designing comparative research models. Semax acts predominantly via BDNF modulation and melanocortin receptor interaction pathways, whereas Selank is a synthetic analog of the immunomodulatory peptide tuftsin designed to alter GABAergic and monoaminergic neurotransmission. Researchers investigating cognitive processing and neuroprotection often run parallel trials using both compounds.
In addition to baseline sequences, modified analogs such as N-Acetyl Semax Amidate are frequently evaluated in metabolic degradation assays. The acetylated and amidated terminals alter enzymatic cleavage susceptibility, charge distribution, and membrane permeability characteristics. Evaluating these related research compounds within the same experimental architecture helps clarify the precise relationship between peptide modification and biological half-life in neurobiological studies.
The scientific validity of any laboratory experiment relies on peptide purity and identity. PX1 Research enforces rigorous quality control protocols for all research peptides. Every batch of Semax undergoes strict Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) to verify chemical purity exceeding 98%. Analytical HPLC chromatograms provide definitive quantitative data regarding the absence of truncated sequences or chemical impurities.
Complementing HPLC analysis, Electrospray Ionization Mass Spectrometry (ESI-MS) confirms the exact molecular mass of the peptide fragment. Furthermore, because bacterial endotoxins (lipopolysaccharides) can alter neuroinflammatory and cellular signaling pathways in culture, PX1 Research conducts LAL endotoxin testing on every production lot. This ensures batch-to-batch consistency and protects cell culture assays from non-specific inflammatory artifacts.
Semax is supplied as a lyophilized (freeze-dried) cake or powder to preserve peptide integrity during transport and long-term storage. Upon receipt, unopened vials should be stored in a dry environment at -20°C or -80°C for optimal shelf stability. Exposure to light, moisture, and elevated temperatures should be minimized to avoid hydrolysis or oxidation of the methionine residue within the peptide chain.
For laboratory reconstitution, researchers should utilize sterile, laboratory-grade solvents such as Bacteriostatic Water or sterile phosphate-buffered saline (PBS, pH 7.4). Avoid vigorous vortexing or mechanical agitation, which can induce physical shear stress and lead to peptide aggregation. Gently swirl the vial until the lyophilized solid is fully dissolved, aliquot into single-use working volumes, and freeze reconstituted solutions to prevent freeze-thaw degradation cycles.
PX1 Research simplifies institutional procurement by providing scalable ordering solutions, verified documentation, and predictable shipping logistics. Whether fulfilling single-vial exploratory projects or large-scale institutional requirements through our wholesale lab program, every order includes accessible batch data and direct verification records.
All products are manufactured within the United States and shipped directly from facilities located in California and Arizona. Orders placed Monday through Friday ship same-day to minimize supply chain latency for time-sensitive laboratory schedules. PX1 Research exclusively serves qualified researchers, universities, and biotechnology firms committed to advancing chemical and biological science.
What is Semax peptide used for in laboratory research?
Semax is a synthetic ACTH(4-10) peptide analog studied in preclinical models for its effects on neurotrophic factor expression (BDNF, NGF), neurovascular regulation, ischemia response, and monoaminergic neurotransmission.
How does PX1 Research verify the purity of Semax?
Every lot of Semax undergoes RP-HPLC testing to confirm peptide purity ≥98%, mass spectrometry to verify molecular weight, and LAL assays to ensure endotoxin levels meet strict laboratory standards. Batch-specific COAs are provided.
What solvent should be used to reconstitute Semax for in vitro testing?
Semax is readily soluble in aqueous solutions. Researchers commonly use sterile Bacteriostatic Water or phosphate-buffered saline (PBS, pH 7.4) depending on the requirements of their cell culture or analytical assay.
How should lyophilized Semax peptide be stored?
Lyophilized Semax should be kept at -20°C or -80°C in a desiccated environment away from light. Reconstituted aliquots should be frozen to avoid repeated freeze-thaw cycles.
What is the difference between Semax and Selank?
Semax is derived from an ACTH fragment and acts primarily on BDNF, NGF, and melanocortin systems, whereas Selank is derived from tuftsin and modulates GABAergic neurotransmission and immune signaling pathways.
Where are PX1 Research peptides manufactured and shipped from?
All PX1 Research compounds are manufactured in US-based facilities and dispatched directly from distribution hubs in California and Arizona, offering same-day dispatch for orders placed Monday through Friday.
Is Semax approved for human administration?
No. Semax provided by PX1 Research is strictly sold as a research chemical for in vitro, preclinical, and analytical laboratory applications. It is not intended for human or animal therapeutic use.
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.