1. Departments
of Bioengineering, University of California, Berkeley, California 94720, United States
2. The University of California, Berkeley and University of California, San Francisco Graduate Program in Bioengineering, Berkeley, California 94720, United States
3. Energy
Biosciences Institute, University of California, Berkeley, 2151 Berkeley
Way, Berkeley California 94704, United States
4. Physical
Biosciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States