the apparent partition coefficients between the external medium and the cytosolic surface of the inner membrane ( k ' o ) and the internal matrix volume and matrix face of the inner membrane ( k ' i ) were determined and were utilized to estimate the membrane potential delta psi from the cation accumulation factor rc according to the relation delta psi = rt/zf ln [ ( rcvo - k ' o ) / ( vi + k ' i ) ] where vo and vi are the volume of the external medium and the mitochondrial matrix , respectively , and rc is the ratio of the cation content of the mitochondria and the medium .
C1510421
mitochondrial matrix
C0026237
mitochondria