SS 31 Peptide For Sale Online

Direct Answer: Sourcing Research-Grade SS-31 Peptide Online

When purchasing SS-31 peptide for sale online, research institutions must prioritize verified analytical purity, detailed lot traceability, and low endotoxin thresholds. High-purity SS-31 (Elamipretide) should be acquired strictly as a lyophilized research reagent from accredited suppliers that provide transparent, lot-specific Certificate of Analysis (COA) documents verified by independent ISO 17025 laboratories using RP-HPLC and mass spectrometry.

PX1 Research provides researchers with reliable access to premium SS-31 peptide manufactured under strict quality standards in the United States. Designed exclusively for non-clinical laboratory use, our compounds undergo comprehensive analytical testing to guarantee that target concentrations, peptide identity, and purity parameters exceed standard scientific benchmarks.

What is SS-31 (Elamipretide)? Structure and Physicochemical Profile

SS-31, also known in scientific literature as Elamipretide or Bendavia, is a synthetic tetrapeptide with the amino acid sequence D-Arg-Dmt-Lys-Phe-NH2 (where Dmt represents 2',6'-dimethylL-tyrosine). First characterized in the Szeto-Schiller laboratory, this small molecule possesses a unique structural motif featuring alternating aromatic residues and basic amino acids, giving it a net 3+ positive charge at physiological pH.

Unlike conventional amphipathic peptides that disrupt lipid bilayers, SS-31 selectively penetrates cell membranes and concentrates in the inner mitochondrial membrane (IMM). Its specific affinity for cardiolipin—a unique tetraacyl phospholipid localized almost exclusively to the IMM—allows researchers to study targeted mitochondrial bioenergetics without inducing membrane lysis or non-specific pore formation.

Investigating the structural dynamics of SS-31 requires access to pristine, salt-controlled reagents. Researchers looking for specialized tools can explore our complete catalog of research peptides to support diverse experimental designs across molecular biology, biochemistry, and cell culture platforms.

Mechanism of Action: Cardiolipin Binding and Mitochondrial Homeostasis

The primary mechanism of SS-31 investigated in preclinical models centers on its physical association with cardiolipin. Cardiolipin plays a critical structural role in maintaining cristae curvature, organizing respiratory chain supercomplexes (respirasomes), and anchoring cytochrome c to the inner membrane. Under conditions of oxidative stress, cardiolipin undergoes peroxidation, destabilizing respirasomes and releasing cytochrome c into the cytosol.

In vitro lipid-binding assays demonstrate that SS-31 electrostatic and hydrophobic interactions allow it to insert into the cardiolipin headgroup interface. Preclinical models indicate that this binding stabilizes cristae architecture, optimizes electron transfer through Complexes I–IV, reduces electron leakage, and minimizes secondary reactive oxygen species (ROS) production.

Furthermore, by preserving cardiolipin structural integrity, SS-31 prevents the pathological opening of the mitochondrial permeability transition pore (mPTP) in isolated organelle assays. Laboratory investigation into these mechanisms provides critical insights into organelle preservation, cellular senescence, and metabolic flux control.

Preclinical Literature Overview: Cellular and Animal Model Findings

Extensive literature published over the past decade details the functional impacts of SS-31 across various laboratory models. In cultured primary cardiomyocytes and neuronal cell lines subjected to hypoxia-reoxygenation protocols, SS-31 administration in culture media demonstrated a marked reduction in intracellular ROS accumulation and preserved ATP synthesis rates relative to untreated controls.

In rodent models of ischemia-reperfusion injury, researchers observed that pre-incubation or acute treatment with SS-31 significantly attenuated tissue necrosis, reduced inflammatory cytokine signaling (such as TNF-alpha and IL-6), and preserved mitochondrial membrane potential. Animal studies focused on age-related muscle weakness revealed that long-term SS-31 exposure restored mitochondrial coupling efficiency and reduced mitochondrial DNA damage in senescent skeletal muscle tissue.

Researchers analyzing these pathways frequently cross-reference data from our broad research library to compare how cardiolipin-targeted peptides modulate metabolic parameters against classical antioxidants or signal transduction inhibitors.

Comparative Analysis: SS-31, MOTS-c, and Humanin

When designing protocols focused on mitochondrial physiology, investigators often evaluate SS-31 alongside mitochondrial-derived peptides (MDPs) like MOTS-c and Humanin. While all three compounds target organelle function, their structural origins and signaling cascades differ substantially.

SS-31 is a synthetic tetrapeptide that acts via direct structural interactions with cardiolipin on the inner mitochondrial membrane to optimize electron transport and curb ROS generation. In contrast, MOTS-c is an endogenous 16-amino-acid peptide encoded by the mitochondrial 12S rRNA gene that translocates to the nucleus under metabolic stress to regulate nuclear gene expression and systemic insulin sensitivity. Meanwhile, Humanin is a 24-amino-acid MDP that primary functions by binding extracellular receptors and intracellular BH3-only proteins to suppress apoptosis and mitigate neurodegenerative stress signaling. For broader cellular metabolic studies, researchers may also evaluate these compounds alongside metabolic modulators like retatrutide or mitochondrial dynamics probes detailed in our mitochondrial peptides research guide.

Evaluating Supplier Quality: RP-HPLC, Mass Spectrometry, and COAs

Because synthetic peptide impurities—such as truncated sequences, deletion peptides, and residual TFA salts—can confound experimental outcomes, selecting a rigorous supplier for SS-31 peptide for sale online is paramount. Laboratory investigators must demand verifiable analytical documentation before introducing any reagent into experimental pipelines.

A compliant Certificate of Analysis must report raw data from Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) showing a minimum purity of 98%. Additionally, Electrospray Ionization Mass Spectrometry (ESI-MS) or MALDI-TOF data must confirm the exact molecular weight (monoisotopic mass of 639.80 g/mol for SS-31 free base) to rule out sequence errors.

PX1 Research ensures complete transparency by publishing lot-specific analytical reports accessible directly on our platform. Research groups requiring specialized quantities or recurring batch reservations can establish verified lab accounts via our wholesale peptide procurement portal.

Endotoxin Verification and Synthesis Standards

For cell culture assays, primary cell isolation, and animal model research, bacterial endotoxins (lipopolysaccharides, LPS) pose a severe confounding variable. High endotoxin contamination induces non-specific immune activation, Toll-like receptor 4 (TLR4) pathway initiation, and premature cell death, invalidating bioenergetic measurements.

PX1 Research enforces strict endotoxin screening protocols using Chromogenic Limulus Amebocyte Lysate (LAL) testing, guaranteeing endotoxin levels below 0.1 EU/mg. All manufacturing takes place in state-of-the-art, GMP-compliant facilities within the United States, utilizing automated solid-phase peptide synthesis (SPPS) and rigorous purification steps.

Reconstitution, Handling, and Storage Protocols for Laboratory Use

Proper reconstitution and storage procedures are essential to preserve the structural integrity and biological activity of SS-31 in laboratory settings. Lyophilized SS-31 should be stored upon arrival at -20°C or -80°C in a manual defrost freezer, protected from light and moisture.

Prior to opening the vial, allow the container to equilibrate to room temperature to prevent condensation from forming on the lyophilized cake. For reconstitution, use sterile, bacteriostatic or deionized research-grade water. SS-31 demonstrates excellent aqueous solubility due to its hydrophilic lysine and arginine residues. Gently swirl or invert the vial—avoid vigorous vortexing, which can introduce shear stress and induce peptide aggregation.

Once reconstituted, working aliquots should be prepared immediately to avoid repeated freeze-thaw cycles. Sterile filtered aliquots stored at -80°C remain stable for extended research periods, while working solutions stored at 4°C should be utilized within 7 to 14 days depending on buffer conditions and pH.

Why PX1 Research is the Preferred Choice for Laboratory Reagents

PX1 Research stands as a leading USA-based supplier of analytical-grade research peptides, dedicated exclusively to supporting academic, biotechnology, and institutional laboratories. Every batch of SS-31 is synthesized in domestic GMP-compliant facilities and tested by independent ISO 17025 accredited analytical laboratories.

We maintain full lot traceability, offering direct access to HPLC chromatograms, mass spectra, and endotoxin certificates for every order. Orders placed Monday through Friday ship same-day from our primary logistics hubs in California and Arizona, ensuring rapid delivery and minimal transit degradation for your lab's ongoing experiments.