1. Ennor, A. H., and Morrison, J. F., Physiol. Rev., 38, 631 (1958).
2. Rosenberg, H., and Ennor, A. H., Biochem. J. (in the press).
3. Thoai, N. v., and Robin, Y., Biochim. Biophys. Acta, 14, 76 (1954).
4. Ennor, A. H., Rosenberg, H., Rossiter, R. J., Beatty, I. M., and Gaffney, T., Biochem. J. (in the press).
5. Beatty, I. M., Magrath, D. I., and Ennor, A. H., Nature, 183, 591 (1959).