1. Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota-Twin Cities, St. Paul, Minnesota 55108, United States
2. Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
3. Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
4. California Institute of Quantitative Biosciences (QB3), University of California, Berkeley, California 94720, United States
5. Joint BioEnergy Institute, Emeryville, California 94608, United States
6. Department of Microbiology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
7. BioTechnology Institute, University of Minnesota-Twin Cities, St. Paul, Minnesota 55108, United States