1. Department of Chemistry, Wichita State University, Wichita, Kansas 67260
2. Department of Microbiology and Molecular Genetics, Harvard Medical School, Boston, Massachusetts 02115
3. Del Shankel Structural Biology Center, The University of Kansas, Lawrence, Kansas 66047
4. Case Center for Proteomics and Bioinformatics, Department of Pharmacology, Department of Ophthalmology and Visual Sciences, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106-4988
5. Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0810
6. IMCA-CAT, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Building 435A, Argonne, Illinois 60439