To execute reliable in vitro and preclinical mitochondrial experiments, principal investigators seeking to source SS-31 peptide buy online require certified chemical purity, quantified sequence identity, and verified endotoxin control. PX1 Research supplies high-purity, US-manufactured SS-31 peptide for sale strictly formatted for analytical and non-clinical laboratory applications, supported by lot-specific Certificate of Analysis documentation.
To execute reliable in vitro and preclinical mitochondrial experiments, principal investigators seeking to source SS-31 peptide buy online require certified chemical purity, quantified sequence identity, and verified endotoxin control. PX1 Research supplies high-purity, US-manufactured SS-31 peptide for sale strictly formatted for analytical and non-clinical laboratory applications, supported by lot-specific Certificate of Analysis documentation.
When planning experimental protocols evaluating mitochondrial bioenergetics, oxidative stress pathways, or inner mitochondrial membrane integrity, establishing a reliable reagent supply chain is critical. Researchers seeking to execute an SS-31 peptide buy online order must look beyond general supplier descriptions to evaluate analytical validation data. SS-31 (also recognized in literature as Elamipretide or Szeto-Schiller 31) is a synthetic tetrapeptide designed specifically to target cardiolipin within the inner mitochondrial membrane (IMM). Ensuring batch-to-batch consistency requires rigorous verification via reversed-phase high-performance liquid chromatography (RP-HPLC) and mass spectrometry (MS).
PX1 Research fulfills institutional procurement requirements by offering US-synthesized, highly purified research compounds. Every batch of SS-31 provided to academic, corporate, and government facilities undergoes comprehensive quality control testing in ISO 17025 accredited analytical laboratories. By providing fully transparent, lot-tracked assay documentation, PX1 Research ensures that investigators receive standard-compliant materials necessary for reproducible scientific inquiry across all research peptides within our portfolio.
SS-31 is a aromatic-cationic tetrapeptide with the primary chemical structure D-Arg-Dmt-Lys-Phe-NH2 (where Dmt represents 2',6'-dimethyl-L-tyrosine). This unique spatial arrangement yields an overall 3+ net electrical charge at physiological pH, paired with a hydrophobic structural core. Unlike standard peptide sequences that experience delayed intracellular uptake or require specialized transport mechanisms, the amphipathic design of SS-31 allows it to freely cross plasma membranes driven by cellular potential gradients.
The inclusion of the non-canonical amino acid Dmt plays a vital biochemical role during *in vitro* assays. The dimethylated tyrosine residue acts as an intrinsic scavenger of electron transport chain reactive oxygen species (ROS), particularly hydroperoxides and peroxynitrite radicals. Because the molecule resists enzymatic degradation by common aminopeptidases due to its alternating D- and L-amino acid configuration, SS-31 demonstrates exceptional metabolic stability in cellular media, making it an ideal candidate for long-duration cell culture and tissue model investigations accessible through our research library hub.
The primary mechanism of action documented for SS-31 in preclinical literature revolves around its specific electro-electrostatic interaction with cardiolipin. Cardiolipin is a unique tetra-acyl phospholipid localized almost exclusively to the inner mitochondrial membrane, where it organizes Respiratory Supercomplexes (respirasomes) and anchors cytochrome c to facilitate efficient electron transfer along Complexes I through IV.
Under conditions of cell stress or lipid peroxidation, cardiolipin undergoes structural distortion, causing cytochrome c detachment, electron leakage, and subsequent reduction in adenosine triphosphate (ATP) synthesis efficiency. In vitro assays demonstrate that SS-31 selectively intercalates into cardiolipin-rich membrane domains via electrostatic attraction between its positive basic residues and the negative phosphate headgroups of cardiolipin. Preclinical models indicate that this binding stabilizes cristae architecture, preserves electron transport efficiency, optimizes ATP generation, and inhibits the release of pro-apoptotic factors such as cytochrome c into the cytosol.
Academic and biopharmaceutical investigators utilize SS-31 across a wide range of exploratory preclinical models. The compound's targeted mitochondrial activity makes it a central reference molecule in studies examining cellular aging, microvascular function, and ischemic injury cascades:
• **Ischemia-Reperfusion Models:** Rodent models of acute kidney injury (AKI) and myocardial ischemia utilize SS-31 to evaluate its capacity to attenuate reperfusion-induced burst ROS production and preserve renal or cardiac cellular survival. • **Neurodegenerative In Vitro Assays:** Neural cell cultures exposed to neurotoxic stressors (e.g., amyloid-beta or alpha-synuclein oligomers) are treated with SS-31 to assess mitochondrial membrane potential preservation and dendritic spine integrity. • **Skeletal Muscle Senescence:** Studies in aged murine subjects examine whether targeting cardiolipin restoration improves mitochondrial coupling efficiency, decreases skeletal muscle fatigue, and mitigates age-related sarcopenia markers. • **Ocular Research Protocols:** In vitro and animal models of retinal pigment epithelium (RPE) degeneration utilize SS-31 to investigate protection against light- or oxidant-induced macular mitochondrial collapse.
When evaluating options when sourcing an SS-31 peptide for sale, researchers frequently compare its bioenergetic targeting profile with other mitochondrial-active agents within our catalog. While SS-31 directly interacts with cardiolipin biophysics, alternative compounds like MOTS-c function primarily as nuclear-translocating signaling peptides encoded within the mitochondrial genome to regulate metabolic homeostasis and insulin sensitivity in rodent models.
Similarly, Humanin operates via distinct cytoprotective pathways by binding cell surface receptors or intracellular targets to block Bax activation and apoptosis. Biogerontology models often evaluate SS-31 alongside telomere-associated peptides like Epitalon to study multi-system cellular resilience. Selecting the appropriate research tool depends on whether the protocol requires structural membrane stabilization (SS-31), mitochondrial-derived metabolic signaling (MOTS-c), or transcriptional modulation of longevity pathways.
Securing reliable data in experimental studies requires obtaining research reagents from verified suppliers. Institutions reviewing vendors when planning an SS-31 peptide buy online order should establish strict vendor audit criteria to prevent batch variability, sample contamination, or inactive peptide loads:
1. **Independent Third-Party Testing:** Every lot must undergo testing by an independent ISO 17025 accredited laboratory, with downloadable certificates explicitly detailing identity and purity metrics. 2. **Chromatographic Purity Thresholds:** RP-HPLC assays must confirm purity exceeding 98.0%, ensuring the absence of truncated sequences, deletion peptides, or residual synthesis reagents. 3. **Mass Spectrometric Verification:** Electrospray ionization mass spectrometry (ESI-MS) or MALDI-TOF must confirm exact molecular weight matching the calculated monoisotopic mass of SS-31 (MW: 639.8 g/mol). 4. **Endotoxin Quantification:** Biologics intended for cell culture or preclinical animal administration require strict Limulus Amebocyte Lysate (LAL) testing, verifying endotoxin levels remain below 0.01 EU/μg. 5. **Domestic Cold-Chain Dispatch:** Compounds synthesized and stored in US facilities with immediate dispatch capabilities eliminate shipping degradation risks caused by extended international transit.
PX1 Research maintains a rigorous quality control framework for every lot of SS-31 peptide for sale. Raw synthesis products undergo purification via preparative liquid chromatography followed by analytical RP-HPLC testing using gradient C18 columns. Chromatograms provided in our public COA documents demonstrate a sharp, symmetrical primary peak corresponding to pure SS-31, ensuring minimal background noise or peak broadening from impurities.
Furthermore, total mass identity is verified via high-resolution ESI-MS to confirm the exact ionic mass profile without unexplained adducts or degradation products. Endotoxin control is particularly critical for cellular assays where lipopolysaccharide (LPS) contamination could trigger non-specific inflammatory signaling pathways, skewing cytokine assay readouts. PX1 Research subjects all lyophilized lots to stringent LAL assay validation to guarantee cellular compatibility for advanced *in vitro* research.
SS-31 is supplied as a sterile, lyophilized cake or powder to preserve peptide bond stability during transport. For optimal dissolution and stability in laboratory settings, researchers should follow standard aseptic peptide handling procedures:
• **Reconstitution Solvents:** Reconstitute lyophilized SS-31 using sterile Bacteriostatic Water (0.9% benzyl alcohol) for multi-use analytical aliquots, or sterile 0.9% Normal Saline / Phosphate-Buffered Saline (PBS, pH 7.4) for immediate *in vitro* work. Additional reconstitution protocols are detailed in our specialized reconstitution guide. • **Dissolution Protocol:** Allow the vial to equilibrate to room temperature before adding solvent to avoid condensation moisture inside the vial. Gently swirl the solution until fully dissolved; avoid vigorous vortexing to prevent mechanical shear stress on the peptide sequence. • **Storage Parameters:** Store lyophilized SS-31 at -20°C for short-term preservation or -80°C for long-term storage (up to 24 months). Once reconstituted, liquid aliquots should be divided into single-use tubes to avoid freeze-thaw cycles and kept at -20°C for up to 30 days.
For universities, CROs, and industrial research facilities conducting high-throughput screening or multi-phase animal studies, securing consistent batch lots in bulk quantities is essential to eliminate variable assay baselines. PX1 Research offers structured procurement channels through our specialized wholesale portal.
Institutional buyers gain access to dedicated account management, bulk lot reservation, customized synthesis configurations, and priority same-day shipping options. All orders ship directly from our climate-controlled facilities located in California and Arizona, ensuring rapid transit times across North America for all domestic research projects.
Where can institutional laboratories find ss 31 peptide buy online options with verified analytical testing?
Institutional researchers can complete an SS-31 peptide buy online order directly through PX1 Research. Every batch of SS-31 is synthesized in US-based facilities and supported by downloadable third-party COA documentation detailing RP-HPLC purity, mass spectrometry mass verification, and LAL endotoxin testing.
What should researchers verify when looking at ss 31 peptide for sale from domestic vendors?
When evaluating an ss 31 peptide for sale listing, researchers should verify third-party analytical COAs per lot, chemical purity exceeding 98.0%, mass spec exact mass match (639.8 g/mol), low endotoxin guarantees (<0.01 EU/μg), and transparent US manufacturing and dispatch origins.
What is the primary chemical structure and molecular weight of SS-31?
SS-31 (Elamipretide) is an aromatic-cationic tetrapeptide with the amino acid sequence D-Arg-Dmt-Lys-Phe-NH2. It features a molecular formula of C32H49N9O5 and a molecular weight of 639.8 g/mol.
How does SS-31 interact with cardiolipin in preclinical mitochondrial models?
In preclinical models, SS-31 electrostatically binds to cardiolipin in the inner mitochondrial membrane. This interaction stabilizes membrane curvature, preserves respirasome organization, reduces electron leakage, and minimizes oxidative ROS generation.
What purity level is required for SS-31 in cell culture experiments?
In vitro cell culture assays require a minimum peptide purity of 98.0% alongside certified low endotoxin levels to prevent non-specific immunological responses or cellular toxicity caused by synthesis byproducts.
How should SS-31 lyophilized powder be reconstituted for laboratory use?
Equilibrate the vial to room temperature, then introduce sterile phosphate-buffered saline (PBS) or bacteriostatic water down the inner vial wall. Gently rotate the vial until the peptide dissolves completely. Avoid harsh mechanical vortexing.
What are the recommended storage temperatures for SS-31 powder and liquid solution?
Lyophilized SS-31 powder should be stored long-term at -20°C or -80°C in a desiccated environment. Reconstituted solution aliquots should be frozen at -20°C for up to 30 days and protected from repeated freeze-thaw cycles.
Does PX1 Research include a lot-specific Certificate of Analysis with SS-31 orders?
Yes. Every shipment of SS-31 from PX1 Research includes access to a lot-specific COA generated by an independent ISO 17025 accredited laboratory showing RP-HPLC liquid chromatography and mass spec spectral results.
What endotoxin standard applies to PX1 Research SS-31 peptides?
PX1 Research enforces strict quality control, ensuring that SS-31 research compounds test below 0.01 EU/μg via standard Limulus Amebocyte Lysate (LAL) testing protocols.
How does SS-31 differ from MOTS-c in experimental bioenergetic models?
SS-31 acts directly as a structural membrane stabilizer binding cardiolipin in the IMM, whereas MOTS-c is a mitochondrial-derived signaling peptide that translocates to the cell nucleus to modulate nuclear gene expression and systemic metabolic pathways.
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