So the F one and the F zero are connected at two points. Firstly, they're connected through the gamma epsilon central stock and then they're also connected through the arm formed by the A subunit, the two B subunits and the delta subunits. Now some of these polypeptide chains actually rotate and some of them are stationary. So we can generalize and break down the ATP synthase into two regions the rotating region and the stationary region. Now the rotating region basically consists of the sea ring. So this entire orange structure as well as that central stalk that consists of this red gamma structure and this blue epsilon structure.