And those electrons ultimately are transferred onto the electron carrier molecule known as coenzyme Q Ubiquinone that we're going to look at in just a moment. Now, this protein complex number one also acts as a proton pump. So the fact that we have the movement of electrons within this complex that generates a form of energy that allows us to actually move these H plus ions across this membrane to this side and that ultimately allows us to actually generate a proton electrochemical gradient that will ultimately be used by the ATP synthase molecule to form the ATP molecule. So this is protein complex one. So once again, complex one, also known as NADH dehydrogenase or NADH oxidore ductase, is a very large complex that consists of about 46 individual polypeptide chains. It has an l shape that contains a horizontal component found within the inner membrane and the vertical component that lies within the matrix of the mitochondria.