[1] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94720 USA
[3] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Synthet Biol Dept, Phys Biosci Div, Berkeley, CA 94720 USA
[4] Joint BioEnergy Inst, Emeryville, CA 94608 USA