About the Authors

Benoît Kornmann

Affiliation Department of Molecular Biology, University of Geneva, Geneva, Switzerland

Olivier Schaad

Affiliation Department of Biochemistry, University of Geneva, Geneva, Switzerland

Hermann Bujard

Affiliation Zentrum für Molekulare Biologie, Universität Heidelberg, Heidelberg, Germany

Joseph S Takahashi

Affiliation Howard Hughes Medical Institute, Department of Neurobiology and Physiology, Northwestern University, Evanston, Illinois, United States of America

Ueli Schibler

To whom correspondence should be addressed. E-mail: ueli.schibler@molbio.unige.ch

Affiliation Department of Molecular Biology, University of Geneva, Geneva, Switzerland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

BK, HB, and US conceived and designed the experiments. BK performed the experiments. BK, OS, and US analyzed the data. HB and JST contributed reagents/materials/analysis tools. BK and US wrote the paper.