About the Authors

Chikara Furusawa

To whom correspondence should be addressed. E-mail: furusawa@ist.osaka-u.ac.jp

Affiliations Department of Bioinformatics Engineering, Graduate School of Information Science and Technology, Osaka University, Suita, Osaka, Japan , Complex Systems Biology Project, ERATO, JST, Komaba, Meguro-ku, Tokyo, Japan

Kunihiko Kaneko

Affiliations Complex Systems Biology Project, ERATO, JST, Komaba, Meguro-ku, Tokyo, Japan , Department of Pure and Applied Sciences, University of Tokyo, Komaba, Meguro-ku, Tokyo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

CF and KK conceived and designed the experiments. CF performed the experiments. CF analyzed the data. CF and KK wrote the paper.