And this Ubiquinone is actually used to recycle this electron so that once the Ubiquinone picks up that electron, it is partially reduced into semiquinone radical ion, which is given by this designation. So Q a single electron and that negative sign. Now, this is the first half cycle. Let's move on to the second half cycle. So next, this structure basically detaches and a second consecutive Ubiquinol actually binds onto this location. And once this Ubiquinol, a second different Ubiquinol, binds onto this complex three, the same type of pathway is basically followed by those two electrons and by the protons.