ATP synthase is an important enzyme that creates the energy currency molecule adenosine triphosphate (ATP). It is formed from adenosine diphosphate (ADP) and inorganic phosphate (Pi), and needs energy for its formation.
Located within the thylakoid membrane and the inner mitochondrial membrane, ATP synthase consists of two regions
the FO portion embedded within the membrane.
the F1 portion of the ATP synthase is outside the membrane, but inside the matrix of the mitochondria.