SS-31
SS-31 is a mitochondria-targeted synthetic tetrapeptide studied for cardiolipin binding at the inner mitochondrial membrane, and the research catalog lists it at https://onesourcepeptides.com/product/ss-31.
Papers also use the research name elamipretide (and MTP-131) for the same tetrapeptide scaffold. Mitchell et al., Journal of Biological Chemistry, 2020 (PMID 32273339) report that SS-31 associates with lipid bilayers and modulates membrane surface electrostatics as part of its action near cardiolipin-rich membranes. Chavez et al., PNAS, 2020 (PMID 32554501) map a mitochondrial protein interaction landscape for SS-31, giving a clear systems view of where the peptide engages in mitochondrial preparations.
Allen et al., Communications Biology, 2020 (PMID 32680996) examine cardiolipin binding and cristae network organization with the same peptide chemistry in a cardiac ischemia–reperfusion rat model. The research names also appear in trial-registry records such as ClinicalTrials.gov NCT02367014; this note cites that page as registry presence only.
Lot identity and purity belong on the certificate of analysis for the vial in hand—see Are research peptides third-party tested?. SS-31 on the catalog is laboratory research supply only. This note is not dosing, reconstitution, or human-use guidance.