About the Authors

Alexander V. Ratushny

Affiliation Institute for Systems Biology, Seattle, Washington, United States of America

Ilya Shmulevich

Affiliation Institute for Systems Biology, Seattle, Washington, United States of America

John D. Aitchison

jaitchison@systemsbiology.org

Affiliation Institute for Systems Biology, Seattle, Washington, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AVR IS JDA. Performed the experiments: AVR. Analyzed the data: AVR IS JDA. Wrote the paper: AVR IS JDA.