1. Departments
of Chemistry, Molecular Biosciences, and the Feinberg School of Medicine, Northwestern University, Evanston, Illinois 60208, United States
2. Department
of Microbiology and the Carl R. Woese Institute of Genomic Biology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
3. Integrated
Molecular Structure Education and Research Center, Weinberg College
of Arts and Sciences, Northwestern University, Evanston, Illinois 60208, United States