Buy SS-31 — USA-Made, COA per Lot
PX1 Research provides high-purity, USA-synthesized SS-31 (Elamipretide) manufactured specifically for in vitro and preclinical laboratory applications. Every lot undergoes rigorous HPLC and mass spectrometry verification alongside quantitative endotoxin testing to guarantee consistent experimental reproducibilty.
Quick answer
PX1 Research provides high-purity, USA-synthesized SS-31 (Elamipretide) manufactured specifically for in vitro and preclinical laboratory applications. Every lot undergoes rigorous HPLC and mass spectrometry verification alongside quantitative endotoxin testing to guarantee consistent experimental reproducibilty.
Key takeaways
- When principal investigators and laboratory technicians prepare to [buy SS-31](/product/ss-31-peptide), securing a verified, highly pure research compound is essential for valid experimental outcomes.
- [SS-31](/research-peptides/ss-31) is structurally defined as D-Arg-Dmt-Lys-Phe-NH2, a small, cell-permeable peptide sequence featuring alternating aromatic and basic amino acid residues.
- The global marketplace for research chemicals presents significant risks for scientific laboratories.
- Purity assertions mean little without accessible, raw analytical data.
Sourcing High-Purity SS-31 for Preclinical Research
When principal investigators and laboratory technicians prepare to buy SS-31, securing a verified, highly pure research compound is essential for valid experimental outcomes. SS-31, also designated in scientific literature as Elamipretide or Szeto-Schiller 31, is a synthetic tetrapeptide that has attracted significant attention across cell biology, bioenergetics, and aging research. Because subtle impurities or endotoxin contamination can distort delicate cellular assays, sourcing from a validated domestic supplier is critical.
PX1 Research synthesizes all peptides within state-of-the-art, GMP-compliant facilities located in the United States. Rather than relying on unverified international brokers, our team manages strict quality control protocols from peptide assembly through final vial packaging. Investigators referencing our research library rely on this batch-to-batch consistency to execute high-throughput screening and long-term animal models without baseline artifacts.
SS-31 Biochemical Structure and Target Mechanism
SS-31 is structurally defined as D-Arg-Dmt-Lys-Phe-NH2, a small, cell-permeable peptide sequence featuring alternating aromatic and basic amino acid residues. This unique motif allows the compound to concentrate selectively at the inner mitochondrial membrane (IMM) without depending on mitochondrial membrane potential. In vitro data indicate that the dimethyltyrosine (Dmt) residue plays a pivotal role in scavenging reactive oxygen species (ROS) directly at the site of electron transport chain activity.
Preclinical studies suggest that SS-31 binds electrostatically to cardiolipin, an essential phospholipid localized predominantly in the IMM. Cardiolipin plays a structural role in organizing respiratory supercomplexes and maintaining membrane curvature. In rodent models of metabolic stress, interaction with cardiolipin has been observed to stabilize mitochondrial cristae architecture, optimize ATP synthase operation, and minimize electron leakage. For research teams evaluating mitochondrial dysfunction, using a fully characterized mitochondrial research peptide ensures that observed bioenergetic shifts stem solely from the active molecule.
PX1 Research vs. Overseas Peptide Vendors: The Quality Gap
The global marketplace for research chemicals presents significant risks for scientific laboratories. Overseas vendors frequently offer low-cost reagents that lack full analytical transparency, often supplying outdated or batch-generic Certificates of Analysis (COAs). Common failure points in imported peptides include heavy metal residues, high trifluoroacetate (TFA) salt retention, variable peptide content percentages, and significant bacterial endotoxin levels that can compromise cell viability in culture.
PX1 Research eliminates these experimental variables by adhering strictly to domestic manufacturing and rigorous analytical verification. When you choose to buy SS-31 from PX1, your order is backed by lot-specific testing executed in an independent, ISO 17025 accredited laboratory. While foreign suppliers may take weeks to deliver material via unmonitored international postal networks, PX1 dispatches orders directly from our temperature-regulated facilities in California and Arizona, providing rapid transit and guaranteed cold-chain integrity when required.
Analytical Verification: HPLC, Mass Spectrometry, and COA Transparency
Purity assertions mean little without accessible, raw analytical data. PX1 Research subjects every lot of SS-31 to rigorous analytical methodologies, publishing full analytical reports directly to our catalog. Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) is utilized to confirm peptide purity levels above 99.0%, ensuring the complete absence of truncated sequences, deletion peptides, or residual synthesis reagents.
In tandem with RP-HPLC, Electrospray Ionization Mass Spectrometry (ESI-MS) is conducted to confirm the exact molecular weight (639.8 g/mol) and chemical structure of the synthesized peptide. Through our commitment to open documentation, researchers can review these results in our analytical testing guide prior to issuing purchase orders, ensuring that every vial entering the laboratory meets the exact specifications required for publication-grade research.
Endotoxin Control in Cell Culture and Mitochondrial Assays
Bacterial endotoxins (lipopolysaccharides or LPS) represent one of the most pervasive contaminants in peptide synthesis. In mitochondrial and immunological research, even picogram-level endotoxin contamination can trigger false-positive inflammatory responses, alter toll-like receptor (TLR) signaling, and induce premature apoptosis in cultured primary cells.
To protect in vitro model systems, PX1 subjects all peptide lots to quantitative chromogenic Limulus Amebocyte Lysate (LAL) assay testing. Our SS-31 peptide is verified to contain endotoxin levels well below industry standards (<0.01 EU/mg). By strictly limiting endotoxin content, PX1 ensures that researchers investigating mitochondrial ROS production, cellular respiration, or inflammatory pathways isolate the true physiological impact of SS-31 without confounding immune activation.
Comparative Analysis: SS-31, MOTS-c, and NAD+ in Bioenergetic Models
When designing preclinical investigations into cellular energetics and metabolic homeostasis, researchers frequently compare SS-31 alongside other prominent bioenergetic modulators. While SS-31 acts primarily as a structural cardiolipin-stabilizing agent within the inner mitochondrial membrane, the mitochondrial-derived peptide MOTS-c functions chiefly as a metabolic regulator influencing nuclear gene expression and folate-purine synthesis under metabolic stress.
Simultaneously, researchers often incorporate cofactors like NAD+ or repair compounds like BPC-157 into multi-target tissue culture protocols to evaluate parallel pathways of cellular resilience, substrate utilization, and oxidative homeostasis. Utilizing pure, standardized compounds from PX1 across all arms of a study eliminates cross-compound variability and ensures that distinct biochemical pathways can be compared accurately.
USA Production & Fast Domestic Logistics (CA & AZ Facilities)
Research timelines require reliable, predictable reagent delivery. International shipments are frequently subject to customs holds, unexpected clearance fees, and ambient temperature spikes that degrade delicate peptide chains. PX1 Research operates dual fulfillment centers strategically positioned in California and Arizona to guarantee rapid, secure distribution across North America.
Orders placed before 3:00 PM EST Monday through Friday are dispatched the same day. Lyophilized SS-31 is packaged with thermal isolation materials to buffer against ambient temperature fluctuations during transport. This domestic supply chain model gives university departments, biotechnology firms, and contract research organizations (CROs) full confidence that critical experiments will remain on schedule.
Laboratory Handling, Reconstitution, and Storage Protocols
SS-31 is supplied as a lyophilized (freeze-dried) powder in sealed, sterile glass vials under inert gas to maximize shelf life. Upon receipt, lyophilized vials should be stored immediately at -20°C or -80°C for long-term stability. Exposure to light, moisture, and repeated room-temperature thermal cycling should be minimized.
For reconstitution in laboratory settings, researchers should consult our standardized reconstitution guide. Depending on assay requirements, sterile bacteriostatic water or phosphate-buffered saline (PBS, pH 7.4) may be introduced using aseptic technique. Once reconstituted into solution, aliquoting the liquid compound into single-use microcentrifuge tubes is strongly recommended to prevent degradation caused by freeze-thaw cycles. Reconstituted solutions should typically be kept at 4°C for short-term use or stored at -80°C for extended experimental protocols.
Institutional Accounts and Wholesale Procurement
For academic departments, CROs, and industrial research institutions conducting large-scale preclinical trials or high-throughput screens, securing reliable volume supply is essential. PX1 Research accommodates institutional procurement workflows through dedicated account managers, custom lot manufacturing, and competitive volume tier pricing.
Principal investigators and procurement officers can establish a streamlined wholesale lab account to manage recurring shipments, request custom aliquot sizing, or reserve specific synthesis lots for ongoing longitudinal studies. Every wholesale shipment retains the same rigorous third-party analytical verification and lot-specific documentation provided with single-vial orders.
Frequently Asked Questions
How can I verify the purity of my SS-31 lot after purchase?
Every vial of SS-31 sold by PX1 Research features a unique lot number matching an accessible Certificate of Analysis (COA). You can view or download the full HPLC chromatogram and mass spectrometry spectrum directly from our website or by contacting lab support.
What is the sequence and chemical formula of SS-31?
SS-31 (Elamipretide) is a synthetic tetrapeptide with the amino acid sequence D-Arg-Dmt-Lys-Phe-NH2. Its chemical formula is C32H49N9O5 with a molecular weight of 639.8 g/mol.
Why is endotoxin testing critical when purchasing SS-31?
Endotoxins (LPS) cause non-specific inflammatory signaling and cellular stress in cell cultures and animal models. PX1 performs LAL assays to ensure endotoxin levels remain below 0.01 EU/mg, preventing false positives in bioenergetic and ROS assays.
How does PX1 ensure peptide stability during shipping?
PX1 ships SS-31 in a lyophilized state, which provides high chemical stability at ambient temperatures. Material is dispatched from fulfillment centers in California and Arizona with thermal protection, arriving quickly via same-day M-F dispatch.
What solvent is recommended for reconstituting SS-31 for in vitro assays?
SS-31 is highly water-soluble due to its basic amino acid composition. It is typically reconstituted using sterile bacteriostatic water, sterile water for injection, or sterile PBS (pH 7.4), depending on specific culture protocols.
How should SS-31 be stored upon delivery to the lab?
Lyophilized powder should be stored at -20°C or -80°C upon receipt. Once reconstituted, solutions should be aliquoted to avoid freeze-thaw cycles and stored at -80°C for long-term stability or 4°C for immediate short-term use.
What receptor or cellular target does SS-31 interact with?
In preclinical models, SS-31 does not act via classical cell-surface GPCRs. Instead, it selectively concentrates at the inner mitochondrial membrane where it electrostatically interacts with cardiolipin to stabilize membrane structure and reduce ROS.
Does PX1 offer bulk or institutional ordering options for SS-31?
Yes. Institutional buyers, universities, and contract research organizations (CROs) can apply for a wholesale account to access volume pricing, batch reservation, and custom lot packaging options.
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.