So when these electrons travel through complex one, this pumps four protons. Now, these two electrons are collected by Ubiquinol. That becomes ubiquinol. Ubiquinol then travels through the core of the membrane and attaches onto complex three. And complex three then moves those electrons ultimately onto cytochrome C. In the process, a total of two, a net result of two protons, are actually pumped across the membrane from the matrix and into the intermembrane space. And finally, cytochrome C carries those electrons onto complex four.