1. Department of Molecular Biosciences; University of Kansas; Haworth Hall, 1200 Sunnyside Avenue Lawrence KS 66045 USA
2. Department of Pharmaceutical Chemistry; University of Kansas; 2030 Becker Drive Lawrence KS 66047 USA
3. Protein Structure Laboratory, Del Shankel Structural Biology Center; University of Kansas; 2034 Becker Drive Lawrence KS 66047 USA
4. IMCA-CAT Hauptman-Woodward Medical Research Institute; 9700 South Cass Avenue, Building 435A Argonne IL 60439 USA