1. Davison, P. F., Proc. U.S. Nat. Acad. Sci., 45, 1510 (1959).
2. Anderson, N. G., Nature, 172, 807 (1953). Fisher, W. D., Anderson, N. G., and Wilbur, K. M., Exp. Cell. Res., 18, 100 (1959).
3. Felix, K., Fischer, M., and Krekels, A., “Prog. in Biophys.”, 6, 1 (1956).
4. Kay, E. R. M., Simmons, N. S., and Dounce, A. L., J. Amer. Chem. Soc., 74, 1724 (1952).
5. Hotchkiss, R. D., in “Methods in Enzymology”, 3, 708, edit. by Colowick, S. P., and Kaplan, N. O. (Academic Press, New York, 1957).