Mitochondrial Metabolism Studies MOTS-c is a short peptide, 16 amino acids long. What makes it unusual is where the instructions for it are stored. They sit inside mitochondrial DNA rather than in the cell nucleus. Studies have measured how it activates AMPK, a pathway that senses cellular energy levels, and how it affects glucose use in muscle models. Only a handful of peptides like it have been found, all within the past twenty years. Formula: C101H152N28O25S2 Mol. weight: 2174.64 Da Length: 16 residues Purity: ≥99% (HPLC verified)