Titration of the binding sites for the oligomycin-sensitivity conferring protein in beef heart submitochondrial particles

Abstract
The binding parameters of the oligomycin-sensitivity conferring protein (OSCP) in inside-out particles from beef heart mitochondria have been tested by means of two assays, the oligomycin-sensitive ATP—Pi exchange, and the oligomycin-sensitive ATP hydrolysis. The total number of OSCP binding sites in A particles was equal to 220 pmol/mg particle protein. Each mole of ATPase active site was able to bind 1.1±0.5 mol OSCP with K d 1.7 nM.