1. Department
of Plant and Microbial Biology, University of California, Berkeley, California 94720, United States
2. Department
of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
3. Department
of Chemistry, University of California, Berkeley, California 94720, United States
4. Department
of Molecular and Cell Biology, University of California, Berkeley, California 94720, United States
5. Physical
Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States