The Subunit Structure of Beef Heart Mitochondrial Adenosine Triphosphatase

The isolated subunits of beef heart mitochondrial ATPase were characterized with regard to physical and chemical properties.Three subunits, molecular weight 54,000, 50,000, and 33,000, respectively, constituted 93% of the protein of the oligomer.The remainder of the molecule consisted of two subunits of molecular weight 17,300 and 5,700.The latter peptide (Subunit 5) was identified by physical criteria with the ATPase inhibitor of Pullman and Monroy(PULLMAN, M. E., AND MONROY, G. (1963)