Figure 1From: Mitochondrion-toxic drugs given to patients with mitochondrial psychosesEukaryotic respiratory chain located at the inner mitochondrial membrane. While electrons are transported horizontally along all respiratory complexes, protons are vertically pumped into the inter-membrane space by complexes I, III, and IV. Via complex V protons are pumped into the matrix to react with the electrons to ATP and H2O (from Wikipedia)Back to article page