1. Bauer, F. C., Jr., and Hirsch, E. F. (1949). Arch. Biochem., 20, 242.
2. Chemistry of Specific, Selective and Sensitive;Feigi, F.,1949
3. Hestnn, S. (1949). J. biol. Chem., 180, 249.
4. Lipmann, F., and Tuttle, L. C. (1945). Ibid., 159, 21.
5. Lipmann, F., and Tuttle, L. C. (1950). Biochim. biophys. Acta, 4, 301.