About the Authors
Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington, United States of America
Burnham Institute for Medical Research, La Jolla, California, United States of America
Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
Department of Earth Sciences, Dartmouth College, Hanover, New Hampshire, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: GEP ASB JKF JLR. Performed the experiments: GEP EAH OVG JDI XZ JHS SBR JLR. Analyzed the data: GEP EAH OVG JDI XZ AO SBR MFR AEK ASB JKF JLR. Contributed reagents/materials/analysis tools: AO MFR AEK. Wrote the paper: GEP AEK ASB JKF JLR.