1. Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63110, USA.
2. Center for Gut Microbiome and Nutrition Research, Washington University School of Medicine, St. Louis, MO 63110, USA.
3. A. A. Kharkevich Institute for Information Transmission Problems, Russian Academy of Sciences, Moscow 127994, Russia.
4. Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA.
5. Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA.