1. Bartlett, G. R.: J. biol. Chem. 234, 466 (1959).
2. Bishop, M., G. E. Harrison, W. H. A. Raymond, A. Sutton, and J. Rundo: Int. J. Radiat. Biol. 2, 125 (1960).
3. Harrison, G. E., W. H. A. Raymond, and H. C. Tretheway: Clin. Sci. 14, 681 (1955).
4. Laszlo, D., and H. Spencer: Proc. II. UN-Intern. Conf. Peaceful Uses Atomic Energy, Geneva 23, 425 (1958).
5. Schmid, A.: Hoppe-Seylers Z. physiol. Chem. 326, 177 (1961).