1. Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
2. Chemical
Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
3. School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
4. Cellular
and Molecular Immunology Laboratory, Gavin Herbert Eye Institute, University of California Irvine, School of Medicine, Irvine, California 92697, United States