1. Department of Chemistry; University of California; Davis California 95616
2. Joint Center for Structural Genomics, http://www.jcsg.org
3. Stanford Synchrotron Radiation Lightsource; SLAC National Accelerator Laboratory; Menlo Park California 94025
4. Center for Research in Biological Systems; University of California; San Diego La Jolla California 92093
5. Program on Bioinformatics and Systems Biology; Sanford-Burnham Medical Research Institute; La Jolla California 92037
6. Protein Sciences Department; Genomics Institute of the Novartis Research Foundation; San Diego California 92121
7. Department of Integrative Structural and Computational Biology; The Scripps Research Institute; La Jolla California 92037