1. Institute of Biological Chemistry, Washington State University, Pullman, Washington 99164, United States
2. Biosciences Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
3. Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States
4. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
5. School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
6. Pacific Northwest National Laboratory, Richland, Washington 99352, United States
7. Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia 30602, United States