SS-31 For Sale — Research Grade

SS-31 (Elamipretide) Overview in Laboratory Research

SS-31, historically categorized as Szeto-Schiller peptide 31 or Elamipretide, is a synthetic tetrapeptide engineered specifically to target the inner mitochondrial membrane (IMM). Composed of the sequence D-Arg-Dmt-Lys-Phe-NH2, SS-31 exhibits unique biophysical properties due to its alternating aromatic-cationic structural motif. In preclinical models, this motif allows the peptide to freely penetrate cellular membranes and selectively concentrate at the inner mitochondrial membrane independent of mitochondrial membrane potential.

Primary interest in SS-31 stems from its capacity to interact directly with cardiolipin, an essential phospholipid localized predominantly within the inner mitochondrial membrane. When investigators evaluate high-purity SS-31 for sale, the objective is typically to analyze how cardiolipin-peptide interaction influences electron transport chain dynamics, reactive oxygen species (ROS) production, and mitochondrial cristae structure. PX1 Research supplies this compound strictly for in vitro assays, spectroscopic analyses, and controlled preclinical laboratory models.

Molecular Architecture and Cardiolipin-Binding Mechanism

At the structural level, cardiolipin plays a foundational role in organizing the proteins of the inner mitochondrial membrane into functional supercomplexes (respirasomes). By maintaining optimal membrane curvature and electron transfer efficiency between Complex I, Complex III, Cytochrome c, and Complex IV, cardiolipin serves as a structural anchor for bioenergetic machinery. Preclinical studies suggest that under conditions of oxidative stress, cardiolipin undergoes peroxidation, destabilizing these supercomplexes and promoting mitochondrial decay.

In vitro data indicate that SS-31 electrostatically and hydrophobically binds to cardiolipin molecules. By occupying the hydrophobic interface between cardiolipin headgroups, SS-31 helps prevent cardiolipin oxidation and maintains optimal electron transfer kinetics along the respiratory chain. Researchers utilizing SS-31 in laboratory models frequently measure markers such as ATP production rate, oxygen consumption rate (OCR), mitochondrial membrane potential (ΔΨm), and Cytochrome c release assays to characterize these membrane-stabilizing phenomena.

Analytical Purity and Quality Control Protocols

Reliable scientific outcomes require uncompromised chemical purity and verifiable batch consistency. When sourcing SS-31 research peptide, bench scientists require full analytical transparency to eliminate confounding variables caused by synthesis byproducts, truncated peptide sequences, or residual TFA (trifluoroacetic acid) salts.

PX1 Research Subjects every batch of SS-31 to comprehensive quality control assays in an ISO 17025 accredited laboratory facility. Analytical verification includes:

• High-Performance Liquid Chromatography (HPLC): Confirms chemical purity consistently exceeding 98.0%, verifying the absence of truncated sequences or related peptide impurities. • Mass Spectrometry (MS): Confirms exact molecular weight (839.04 g/mol expected) and sequence integrity. • Endotoxin Quantification: Ensures bacterial endotoxin levels remain below strict limits (<0.01 EU/mg) to prevent non-specific immune activation in cell culture models. • Residual Solvent & Counter-Ion Analysis: Verifies thorough removal of processing reagents.

Comparative Analysis: SS-31 and Mitochondrial Bioenergetic Peptides

Mitochondrial biology represents a growing frontier within preclinical research. When designing experimental frameworks focused on cellular bioenergetics, researchers frequently compare SS-31 against other targeted peptides within the broader category of mitochondrial research peptides.

While SS-31 acts via direct cardiolipin binding at the inner membrane, compounds such as MOTS-c function primarily as mitochondrial-derived peptides that translocate to the nucleus during metabolic stress to regulate genomic gene expression. Similarly, Humanin serves as a cytoprotective peptide that interacts with intracellular signaling cascades and cell-surface receptors to mitigate apoptosis. In contrast, SS-31 acts via physical membrane interaction without requiring receptor-mediated transcription. Evaluating these distinct modes of action allows researchers to build comprehensive multi-target models of organelle dysfunction in vitro.

In Vitro and Preclinical Research Applications

In experimental settings, SS-31 is routinely employed across a wide spectrum of biochemical and physiological investigations. Preclinical studies demonstrate that SS-31 addition to isolated mitochondria reduces excess hydrogen peroxide emission while preserving phosphorylation efficiency.

Key preclinical domains evaluating SS-31 include:

• Ischemia-Reperfusion Injury Models: Investigating how inner membrane stabilization mitigates opening of the mitochondrial permeability transition pore (mPTP) during reoxygenation. • Neurodegenerative Cell Line Studies: Assessing neuronal mitochondrial morphology, axonal transport, and protection against amyloid-beta or tau-induced metabolic stress. • Renal and Cardiac Bioenergetics: Analyzing microvascular perfusion, tubule integrity, and myocardial oxygen consumption in rodent models of metabolic strain. • Cellular Senescence & Aging Protocols: Evaluating age-related loss of cardiolipin density and corresponding electron transport chain decay in cultured primary fibroblasts.

Reconstitution and Laboratory Handling Guidelines

SS-31 is supplied as a lyophilized (freeze-dried) powder to maximize chemical stability during storage and transport. To maintain peptide integrity upon arrival, research laboratories should adhere to standard aseptic handling procedures.

Lyophilized vials should be stored at -20°C upon receipt, protected from light and moisture. Prior to reconstitution, allow the vial to acclimate to room temperature to reduce condensation upon opening. Reconstitution is typically performed using sterile Bacteriostatic Water, Sterile Water for Injection, or phosphate-buffered saline (PBS), depending on the requirements of the downstream in vitro assay.

Gently swirl or invert the vial until full dissolution occurs; aggressive vortexing or mechanical agitation should be avoided to preserve peptide tertiary interactions. Aliquoting reconstituted stock solutions into single-use microcentrifuge tubes prior to freezing at -80°C prevents repeated freeze-thaw cycles, which can cause chemical degradation over time. For detailed technical protocols, consult the PX1 research library.

Enterprise and Academic Laboratory Sourcing Standards

Academic institutions, biotechnology enterprises, and contract research organizations (CROs) require dependable supply chains capable of delivering uniform product specifications across ongoing longitudinal studies. Inconsistent peptide purity between lots introduces unwanted experimental variance, wasting valuable laboratory time and reagent capital.

PX1 Research maintains rigorous manufacturing oversight in USA-based, GMP-compliant facilities. Every batch of SS-31 is accompanied by a downloadable, lot-specific Certificate of Analysis (COA) directly reflecting HPLC chromatograms and mass spectra data. Investigators seeking bulk quantities or ongoing institutional supply agreements can establish a dedicated wholesale laboratory account to access tailored fulfillment options and batch-reservation guarantees.

Logistics, Packaging, and Same-Day Dispatch

Biochemical reagents require rapid, controlled delivery to maintain product viability and align with strict research schedules. PX1 Research operates dual fulfillment hubs located in California and Arizona, facilitating efficient shipping coverage across the United States.

All orders containing SS-31 for sale placed Monday through Friday prior to our daily cutoff time are processed and dispatched on the same day. Lyophilized peptides are packaged in temperature-stable, light-protective containers designed to withstand ambient temperature fluctuations encountered during transit. Detailed tracking parameters are provided immediately upon shipment dispatch, ensuring seamless receiving procedures for institutional loading docks and scientific laboratories.