* This investigation was supported by grants from the National Science Foundation and the U. S. Public Health Service (RG-5652). t Postdoctoral fellow of the National Foundation. I Suskind, S. R., C. Yanofsky, and D. M. Bonner, these PROCEEDINGS, 41, 577 (1955). 2 Lerner, P., and C. Yanofsky, J. Bact., 74, 494 (1957). 3 Yanofsky, C., Biochim. Biophys. Acta, 31, 408 (1959). 4 Crawford, I. P., an...