Molecular Characteristics
Complete Specifications
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CAS Registry Number: 736992-21-5
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PubChem CID: 11245627
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Peptide Classification: Synthetic tetrapeptide (mitochondria-targeting peptide)
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Molecular Formula: C₃₂H₄₉N₉O₅
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Molecular Weight: ~639.80 Da
Structural Composition
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Amino Acid Sequence:
D-Arg-Dmt-Lys-Phe-NH₂ (Dmt = 2′,6′-dimethyltyrosine) -
Length: 4 amino acids (modified tetrapeptide)
Physical Properties
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Appearance: White to off-white lyophilized powder
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Solubility: Water, bacteriostatic water, buffered aqueous solutions (e.g., PBS)
Structural & Stability Notes
SS-31 (Elamipretide) is a synthetic tetrapeptide containing both standard and non-natural amino acid residues, including D-amino acids and 2′,6′-dimethyltyrosine, which contribute to enhanced resistance to enzymatic degradation under research conditions. Its small size and cationic nature support efficient cellular interaction and strong aqueous solubility. Lyophilized storage under cold, dry conditions is recommended. Protection from moisture, light exposure, and repeated freeze–thaw cycles helps preserve structural integrity and maintain analytical consistency during laboratory applications.





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