. . . "MPP+ (1-methyl-4-phenylpyridinium) is a positively charged molecule with chemical formula C12H12N+. It is toxic and acts by interfering with oxidative phosphorylation in mitochondria by inhibiting complex I, leading to the depletion of ATP and cell death."@en . "1-Methyl-4-phenylpyridin-1-ium"@en . .