... rotor. The stator is composed of subunits aand b, and the rotor is composed of multiple copies of subunit c. They form an oligomeric ring of non-covalently linked subunits, and rotation of the ... This poses the obvious questions of whether the heterooligomeric c ring can promote ATP synthe-sis, whether the c subunit stoichiometry is variable,and, if so, whether a variation of the c1⁄ ... likely,as the c ring is rather stable, and the use of Triton X-100 should not lead to removal of c1only. The basic biochemical properties of the completeenzyme are similar to those of the enzyme...