1. Departments
of Chemistry and Molecular Biosciences, Chemistry of Life Processes
Institute, and the Center for Molecular Innovation and Drug Discovery, Northwestern University, Evanston, Illinois 60208, United States
2. Department
of Chemistry and Biochemistry, Loyola University Chicago, Chicago, Illinois 60660, United States
3. Departments
of Chemistry and Molecular Biosciences and the Proteomics Center of
Excellence, Northwestern University, Evanston, Illinois 60208, United States
4. X-ray
Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States