“Intracellular potassium concentration, as measured by a nigericin null-point technique, was 128 +/- 8 mM. Plasma membrane potential measured with … 3,3-dipropylthiadicarbocyanine iodide was -52 +/- 2 mV. Recovery of intracellular pH in acid-loaded cells occurred after exposure to sodium-containing medium and was inhibited …(-4) M amiloride.”