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SS-31 vs Other Szeto-Schiller Peptides: Key Diffs | Palmetto Peptides
SS-31 vs Other Szeto-Schiller Peptides: Key Differences for Mitochondrial Research Research Notice: This article covers research on SS-31 research peptide and MOTS-C research peptide — available from Palmetto Peptides for laboratory use only. Research Use Only
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SS-31 vs Other Szeto-Schiller Peptides: Key Differences for Mitochondrial Research
Research Notice: This article covers research on SS-31 research peptide and MOTS-C research peptide — available from Palmetto Peptides for laboratory use only.
Research Use Only Disclaimer: All peptides listed on this page are sold exclusively for in vitro and legitimate laboratory research purposes. They are not intended for human consumption, veterinary use, or any clinical application. The information in this article is for scientific and educational reference only and does not constitute medical advice. All research use must comply with applicable federal, state, and institutional regulations. Palmetto Peptides complies fully with all applicable FDA guidelines.
Research Disclaimer: All Szeto-Schiller peptides are sold by Palmetto Peptides as research compounds for in vitro and laboratory use only.
For a complete overview of this research area, see the Complete Guide to SS-31 (Elamipretide) Research Peptide from Palmetto Peptides.
SS-31 became the most widely studied member of the Szeto-Schiller peptide family due to its superior cardiolipin binding and mitochondrial targeting in laboratory models. Researchers can source SS-31 research peptide from Palmetto Peptides with full analytical documentation.
Last Updated: April 21, 2026 | Reading Time: Approximately 2 minutes | Author: Palmetto Peptides Research Team
Quick Answer
Structural Comparison: SS-31 vs SS-02, SS-20, SS-09
SS-02
D-Arg-Tyr-Lys-Phe-NH2
+3
Tyrosine (Tyr)
SS-31
D-Arg-Dmt-Lys-Phe-NH2
Dmt
SS-20
Phe-D-Arg-Phe-Lys-NH2
+2
Phe
SS-09
D-Arg-Dmt-Lys-Trp-NH2
Dmt + Trp at pos 4
SS-31 vs SS-02: The Dmt Advantage
SS-02 differs only at position 2 (Tyr vs Dmt). SS-31 Dmt provides higher membrane affinity, greater metabolic stability due to steric blocking of enzymatic access, and stronger cardiolipin affinity in laboratory models.
Researchers seeking a broader review can consult the Complete Guide to SS-31 (Elamipretide) Research Peptide, which covers the full research landscape in detail.
SS-31 vs SS-20: Charge, Sequence, and Aromatic Identity
SS-20 has lower net charge (+2 vs +3), lacks Dmt, and has different residue ordering — resulting in weaker electrostatic driving force for mitochondrial accumulation in cell-based systems and different membrane interaction properties.
Why SS-31 Is the Research Standard
SS-31 combination of +3 charge, Dmt-enhanced cardiolipin affinity, and metabolic stability made it the most experimentally productive family member, appearing in hundreds of peer-reviewed publications and multiple clinical trials (as elamipretide). See also: MOTS-C mitochondrial research, NAD+ research, longevity peptide research, mitochondrial function research. Order SS-31 here.
Frequently Asked Questions
What is the difference between SS-31 and SS-20?
SS-20 carries net charge +2 vs +3, lacks Dmt, and has different residue ordering. SS-31 shows stronger cardiolipin binding in laboratory models.
Which Szeto-Schiller peptide is most studied?
SS-31 appears in hundreds of peer-reviewed publications and multiple clinical trials.
See Also: SS-31 Research Peptide: Complete Guide
Related Research
Analytical Methods for Verifying SS-31 Research Peptide Identity and Purity in the Lab
Buying Guide: How to Select High-Quality SS-31 Research Peptide from Reputable Lab Suppliers
History and Development of Szeto-Schiller SS Peptides: The Research Origins of SS-31