1. Tuppy, H., and Paléus, S., Acta Chem. Scand., 9, 353 (1955).
2. Theorell, H., Biochem. Z., 298, 242 (1938); Enzymologia, 6, 88 (1939). Paul, K.-G., Acta Chem. Scand., 5, 389 (1951).
3. Margoliash, E., Frohwirt, N., and Weiner, E., Biochem. J., 71, 559 (1959).
4. Keilin, D., and Hartree, E. F., Biochem. J., 39, 289 (1945).
5. Margoliash, E., in Shemin, D., ed., Biochemical Preparations, 5, 33 (1957).