1. Snell, E. E., Physiol. Rev., 33, 509 (1953).
2. Kearney, E. B., and Englard. S., J. Biol. Chem., 193, 821 (1951).
3. Giri, K. V., and Krishnaswamy, P. R., J. Ind. Inst. Sci., 38, 232 (1956).
4. Le, Page, Biochem. Prep., 1, 5 (1949).
5. Giri, K. V., J. Ind. Inst. Sci., 37, 1 (1955); Nature, 173, 1194 (1954).