Biochemical Research Laboratory, Massachusetts General Hospital, Department of Bacteriology and Immunology, Harvard Medical School, Boston, Mass., and Department of Biology

Biochemical Research Laboratory, Massachusetts General Hospital, Department of Bacteriology and Immunology, Harvard Medical School, Boston, Mass., and Department of Biology

Max-Plank-Institut für Immunbiologie

The Departments of Pediatrics and Microbiology, State University of New York at Buffalo, School of Medicine, and the Laboratory of Bacteriology, Children's Hospital

Max-Planck-Institut für Immunbiologie

Institute of Biochemistry, University of Uppsala

Institute of Biochemistry, University of Uppsala

Department of Microbiology, New York University School of Medicine

Department of Microbiology, New York University School of Medicine

Department of Microbiology, New York University School of Medicine

Food Research Institute and Department of Foods and Nutrition, University of Wisconsin

Food Research Institute and Department of Foods and Nutrition, University of Wisconsin

Food Research Institute and Department of Foods and Nutrition, University of Wisconsin

Food Research Institute and Department of Foods and Nutrition, University of Wisconsin

Food Research Institute and Department of Foods and Nutrition, University of Wisconsin

Biological Laboratories, Harvard University, Cambridge, Mass.

Laboratory of Immunology, Albert Einstein Medical Center

Laboratory of Immunology, Albert Einstein Medical Center

Laboratory of Immunology, Albert Einstein Medical Center

Department of the Army

Biophysics Laboratory, Department of Biology, Illinois Institute of Technology

Biophysics Laboratory, Department of Biology, Illinois Institute of Technology

Biophysics Laboratory, Department of Biology, Illinois Institute of Technology

Biophysics Laboratory, Department of Biology, Illinois Institute of Technology

Biophysics Laboratory, Department of Biology, Illinois Institute of Technology