1. Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
2. Department of Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
3. Department of Chemistry, Center for Functional Protein Assemblies, Technical University of Munich, Garching D-85747, Germany
4. Departments of Pediatric Dentistry, Microbiology, Schools of Dentistry and Medicine, University of Alabama at Birmingham, Birmingham 35294, Alabama, United States
5. Department of Microbiology, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts 02115, United States