SS-31 Elamipretide · 50MG

SS-31 (Elamipretide / MTP-131 / Bendavia) is a synthetic mitochondrial-targeting tetrapeptide developed by the Hazel Szeto laboratory and licensed to Stealth BioTherapeutics. The peptide consists of an aromatic-cationic sequence (D-Arg-2′,6′-dimethylTyr-Lys-Phe-NH₂) designed to selectively concentrate in the inner mitochondrial membrane through electrostatic attraction to the negatively charged headgroup of cardiolipin — a unique mitochondrial phospholipid critical for organization of electron transport chain supercomplexes. By binding cardiolipin, SS-31 is studied for stabilizing the structural organization of the inner mitochondrial membrane, preserving cristae architecture, reducing reactive oxygen species (ROS) leak, and supporting ATP synthesis efficiency. The compound has been investigated in preclinical research across cardiac, skeletal muscle, neuronal, and renal models, and has progressed through multiple Phase 3 clinical trials in Barth syndrome and primary mitochondrial myopathy.

Benefits (Research Focus)

• Cardiolipin stabilization — studied for binding cardiolipin in the inner mitochondrial membrane and organizing electron transport chain supercomplexes

• ROS reduction — investigated for decreased reactive oxygen species leak in oxidative stress and aging models

• ATP synthesis support — explored for preserved mitochondrial respiratory chain efficiency and coupling

• Cristae architecture — examined for preservation of inner membrane structure in ischemia and injury models

• Cellular resilience research — researched for protection in cardiac, skeletal muscle, neuronal, and renal preclinical models

What Researchers Look At

• Mitochondrial membrane potential (ΔΨm) and ATP synthesis efficiency

• Cardiolipin oxidation, peroxidation markers, and inner membrane integrity

• Electron transport chain supercomplex assembly and respiratory chain coupling

• Cardiac function endpoints in ischemia-reperfusion and heart failure models

• Skeletal muscle endurance, fatigue resistance, and mitochondrial bioenergetics

Quick Specs

• Form: Lyophilized white powder

• Net Peptide Content: 50 mg per vial

• Quantity: 1 vial

• Appearance: White to off-white lyophilizate

• Reconstitution: Bacteriostatic or sterile water (added by the end researcher)

• Purity: ≥99% by HPLC

• Identity: MS-verified (per COA)

• Storage: Protect from light

Identity Basics

• Compound: SS-31 (Elamipretide)

• Synonyms: Elamipretide; MTP-131; Bendavia; Szeto-Schiller peptide 31

• Class: Mitochondrial-targeting tetrapeptide; cardiolipin-stabilizing aromatic-cationic peptide

• Sequence: D-Arg-2′,6′-dimethylTyr-Lys-Phe-NH₂

• Formula / M.W.: C₃₂H₄₉N₉O₅, ~639.79 g/mol

• CAS: 736992-21-5

⚠️ Disclaimer

• This product is intended for laboratory research use only.
• Not for human or veterinary use.
• Not approved for diagnostic, therapeutic, or medical applications.
• Handle using appropriate laboratory safety procedures and personal protective equipment.

COA Verification Notice: Even if the vial label or product image states a certain concentration, always go by the COA for the true verified value. We reference the COA to determine the verified concentration and purity of each product, regardless of what the label or product image indicates.

Janoshik COA — Third-Party Testing

• SS-31 VPeptide Canada — March 20, 2026

• SS-31 VPeptide Canada — June 4, 2026