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1Department of Microbiology, Washington University School of Medicine, St. Louis, Missouri, and Department of Chemistry, University of Illinois, Urbana, Illinois
1Department of Microbiology, Washington University School of Medicine, St. Louis, Missouri, and Department of Chemistry, University of Illinois, Urbana, Illinois
1Department of Microbiology, Washington University School of Medicine, St. Louis, Missouri, and Department of Chemistry, University of Illinois, Urbana, Illinois
1Department of Microbiology, Washington University School of Medicine, St. Louis, Missouri, and Department of Chemistry, University of Illinois, Urbana, Illinois
1Department of Microbiology, Washington University School of Medicine, St. Louis, Missouri, and Department of Chemistry, University of Illinois, Urbana, Illinois
3
Present address: Division of Biology, California Institute of Technology, Pasadena, California.
4
Present address: Department of Biochemistry, Stanford University School of Medicine, Palo Alto, California.
5
Present address: Department of Medical Chemistry, University of Kyoto, Kyoto, Japan.
6
Present address: Department of Microbiology, New York University School of Medicine, New York, New York.
2
The work presented in this paper was supported by research grants from the U. S. Public Health Service to Dr. Melvin Cohn and Dr. Edwin S. Lennox.