1. Baulieu, E. E. (1960). C.R. Acad. Sci. (Paris), 251, 1421.
2. Bongiovanni, A. M. (1958). J. clin. Invest., 37, 1342. Cr6py, O., Jayle, M. F., and Meslin, F. (1957). Acta endocr. (Kbh.), 24, 233.
3. Edwards, R. W. H., and Kellie, A. E. (1956). Chemy Ind., 250.
4. Nature (Lond.);Gupta, D.,1963
5. Gupta, D., and Tanner, J. M. (1965). Biochem. J., 96, 25 P. Hadd, H. E. (1958). Abstr. Meeting of Amer. Chem. Soc., 54C.