1. Heinz, E., J. Biol. Chem., 211, 781 (1954).
2. Heinz, E., and Walsh, P. M., J. Biol. Chem., 233, 1488 (1958).
3. Rosenberg, T., and Wilbrandt, W., J. Gen. Physiol., 41, 289 (1957).
4. Lacko, L., Burger, M., Hejmová, L., and Rejnková, J., Membrane Transport and Metabolism—Symposium, 399 (Publishing House of Czechoslovak Academia of Science, 1960).
5. Burger, M., Hejmová, L., and Kleinzeller, A., Biochem. J., 71, 233 (1959).