1. Division of Biological Sciences, University of California at San Diego, La Jolla, CA 92093
2. US Department of Energy, Joint Genome Institute, Berkeley, CA 94720
3. Department of Physics, University of California at San Diego, La Jolla, CA 92093
4. Department of Biology, Stanford University, Stanford, CA 94305
5. School of Biological Sciences, Centre for Synthetic and Systems Biology, University of Edinburgh, Edinburgh, EH9 3FF, United Kingdom
6. Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, United Kingdom