SS-31
Price range: $193.00 through $656.00
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SS-31 - Elamipretide Mitochondria-Targeted Research Peptide
SS-31 (elamipretide, MTP-131, Bendavia) is a synthetic tetrapeptide designed specifically to concentrate in the inner mitochondrial membrane and bind cardiolipin - a phospholipid found almost exclusively in mitochondria. It was developed by Hazel Szeto and Peter Schiller in the 2000s as part of a class called “Szeto-Schiller” peptides (the “SS” designation). SS-31 is the reference mitochondria-targeted tetrapeptide in mitochondrial-medicine research because its cardiolipin-binding mechanism is structurally protective rather than transcriptional - it stabilizes the electron transport chain in place rather than signaling for mitochondrial biogenesis.
Why the Cardiolipin-Binding Mechanism Matters
Cardiolipin is the phospholipid that anchors cytochrome c and scaffolds the respiratory complexes inside the inner mitochondrial membrane. When cardiolipin becomes peroxidized (common under oxidative stress and in aging tissues), the electron transport chain becomes leaky - more reactive oxygen species (ROS) escape, and ATP production drops. SS-31 sel
| Pathway | What it does in plain terms |
|---|---|
| Cardiolipin binding | Sel |
| Electron transport chain | Leak reduced - ATP output preserved under oxidative stress |
| ROS production | Reduced - less reactive oxygen species escape the respiratory chain |
| Cytochrome c retention | Preserved in the inner membrane - reduces apoptotic signaling |
| Mitochondrial membrane potential | Maintained under ischemia-reperfusion and other stress conditions |
SS-31 vs Other Mitochondrial-Axis Compounds
The mitochondrial-axis research toolkit has a small group of compounds. They act through different mechanisms - SS-31 is structurally protective; MOTS-c and SLU-PP-332 are signaling-based.
| Compound | Mitochondrial mechanism |
|---|---|
| SS-31 (elamipretide) | Binds cardiolipin - structurally stabilizes the respiratory chain |
| MOTS-c | Mitochondrial-encoded peptide - AMPK activation and metabolic signaling |
| SLU-PP-332 | ERRα agonist - transcriptionally drives mitochondrial biogenesis |
Research Applications
SS-31 is used in studies examining:
- Cardiolipin binding and inner-membrane stabilization endpoints
- Ischemia-reperfusion injury research (cardiac and renal models)
- Barth syndrome and primary mitochondrial disease models
- ROS generation and oxidative stress research
- Heart failure with preserved ejection fraction (HFpEF) endpoints
- Age-related mitochondrial dysfunction and skeletal muscle research
Specifications
| Format | Lyophilized powder |
| Purity | ≥99% |
| Aliases | Elamipretide, SS-31, MTP-131, Bendavia, Szeto-Schiller 31 |
| Available sizes | 10mg · 50mg |
| Storage | 2-8°C unopened; stable 12+ months |
| Use | Research purposes only - not for human use |
Storage & Handling
Unopened vials are kept at 2-8°C under standard cold-chain conditions and remain stable for 12+ months. Reconstitution parameters, solvent compatibility, and post-reconstitution stability for SS-31 are documented in the published peer-reviewed literature and standard peptide-chemistry references.
Reference Literature
Published clinical and preclinical SS-31 literature is available through PubMed, Google Scholar, and other peer-reviewed databases. WWP does not provide protocol design, dosing guidance, or administration parameters. Those decisions rest with the researcher and any applicable institutional review board.
Common Questions About SS-31 Research
What is SS-31 used for in research?
It is studied as the reference mitochondria-targeted cardiolipin-binding peptide. Published work covers inner-membrane stabilization, ischemia-reperfusion injury, Barth syndrome and primary mitochondrial disease, ROS generation, heart failure endpoints, and age-related mitochondrial dysfunction.
What is the difference between SS-31 and elamipretide?
They are the same compound. SS-31 is the research designation (Szeto-Schiller peptide 31). Elamipretide is the generic drug name used in clinical development. MTP-131 and Bendavia are earlier development codes. All refer to the same tetrapeptide.
How does SS-31 compare to MOTS-c?
Both are studied for mitochondrial endpoints but through different mechanisms. SS-31 is a nuclear-encoded synthetic peptide that binds cardiolipin in the inner mitochondrial membrane and stabilizes the electron transport chain (structural protection). MOTS-c is a mitochondrial-encoded peptide that activates AMPK and modulates cellular energy metabolism (signaling). SS-31 preserves existing mitochondrial function; MOTS-c shifts metabolic state.
Is SS-31 FDA approved?
No. SS-31 (elamipretide) is in active clinical development and has received FDA Fast Track and Orphan Drug designations for Barth syndrome, but it is not yet an approved drug product. Every vial WWP ships is labeled and sold strictly for laboratory and research use only.
How is SS-31 stored?
Unopened vials are stored at 2-8°C and stay stable for 12+ months. Once reconstituted with bacteriostatic water, the solution is kept at 2-8°C and used within 28-30 days.
Purity Guarantee
Every batch is ≥99% purity. Send us a COA from any independent test and we’ll issue store credit regardless of what it shows.
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