1. For collected references, see Campbell, P. N., and Work, T. S., p. 996 of this issue of Nature, and also ref. 3(c).
2. For collected references, see Borsook, H., Fortschr. d. Chem. org. Naturst., 9, 292 (1952).
3. (a) Anfinsen, C. B., Science, 114, 683 (1951). (b) Anfinsen, C. B., and Steinberg, D., J. Biol. Chem., 189, 739 (1951); Fed. Proc., 10, 156 (1951). (c) Steinberg, D., and Anfinsen, C. B., J. Biol. Chem., 199, 25 (1952).
4. Dounce, A. L., Enzymologia, 15, 251 (1952).