TPP-IOA is a cytochrome c peroxidase inhibitor. TPP-IOA inhibits apoptosis by preventing cardiolipin oxidation and cytochrome c release to the cytosol. TPP-IOA disrupts oxidative phosphorylation in isolated mitochondria. TPP-IOA inhibits cell death in SH-SY5Y cells grown in glucose, but not galactose. TPP-IOA causes mitochondrial depolarization and network fragmentation. TPP-lOA mitigates radiation induced death in mice[1].