1. Fuels Synthesis Division, Joint BioEnergy Institute, Emeryville, California 94608,
United States
2. Physical Bioscience Division, Lawrence Berkeley National Lab, 1 Cyclotron Road Mail
Stop 978R4121, Berkeley, California 94720, United States
3. Department of Chemical & Biomolecular Engineering, Department of Bioengineering, University of California, Berkeley, California 94720, United States