ADPi + Pi -> ATPi ATPi -> ADPi + Pi ATPi + Cri -> ADPi + PCri ADPi + PCri -> ATPi + Cri ATP + Cr -> ADP + PCr ADP + PCr -> ATP + Cr ATP -> ADP + P Pi -> P P -> Pi Cri -> Cr Cr -> Cri ADPi -> ADP ADP -> ADPi PCri -> PCr PCr -> PCri ATPi -> ATP ATP -> ATPi