1. Department of Microbiology, Cornell University, Ithaca, NY 14853
2. Soil & Crop Sciences Section, School of Integrative Plant Sciences, Cornell University, Ithaca, NY 14853
3. Laboratory for Research in Complex Systems, Menlo Park, CA 94025
4. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
5. Department of Energy Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA 94720