So this structure accepts electrons from either complex one or two to form the reduced form, QH two. And then that travels to complex three, where it gives off those electrons to complex three, which ultimately move along the complex and onto cytochrome C. And cytochrome C, unlike Coenzyme Q, is a small water soluble protein. So remember, this structure is not a protein. Coenzyme Q is not a protein. By cytochrome C is a protein, and it's a water soluble protein. It is bound onto the intermembrane region of complex three.