1. Doak, P. B., and Eyre, K. E. D., Brit. Med. J., ii, 549 (1961).
2. Engel, A. G., Lambert, E. H., Rosevear, J. W., and Tauxe, W. N. (unpublished results).
3. Hurlbert, R. B., Schmitz, Hanns, Brumm, Anne F., and Potter, V. R., J. Biol. Chem., 209, 23 (1954).
4. Committee on Biol. Chem., Div. Chem. and Chem. Tech., Nat. Acad. Sci.—Nat. Res. Counc., Specifications and Criteria for Biochemical Compounds, Publ. 719 (Nat. Acad. Sci.—Nat. Res. Counc., Washington, D.C., 1960).
5. Munch-Petersen, Agenette, and Kalckar, H. M., in Methods in Enzymology, edit. by Colowick, S. P., and Kaplan, N. O., 3, 869 (Academic Press, New York, 1957).