1. Dunn, M. S., Camien, M. N., Rockland, L. B., Shankman, S., and Goldberg, S. C., J. Biol. Chem., 155, 591 (1944).
2. Stein, W. H., and Moore, S., “Biochemical Preparations”, 1, 9 (Wiley, New York, 1950).
3. Stein, W. H., and Moore, S., J. Biol. Chem., 176, 337 (1948).
4. Van Slyke, D. D., Dillon, R. T., MacFadyen, D. A., and Hamilton, P., J. Biol. Chem., 141, 627 (1941). Van Slyke, D. D., MacFadyen, D. A., and Hamilton, P., ibid., 141, 671 (1941).
5. Calvin, M., Heidelberger, C., Reid, J. C., Tolberg, B. M., and Yankwich, P. E., “Isotopic Carbon”, 317 (Wiley, New York, 1949).