About the Authors

Christel Genoud

Contributed equally to this work with: Christel Genoud, Charles Quairiaux

Affiliation Départment de Biologie Cellulaire et de Morphologie, Lausanne, Switzerland

Charles Quairiaux

Contributed equally to this work with: Christel Genoud, Charles Quairiaux

Affiliation Départment de Biologie Cellulaire et de Morphologie, Lausanne, Switzerland

Pascal Steiner

Affiliations Department of Neurobiology, Harvard Medical School, Boston, Massachusetts, United States of America , Faculté des Sciences de la Vie, Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland

Harald Hirling

Affiliation Faculté des Sciences de la Vie, Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland

Egbert Welker

Affiliation Départment de Biologie Cellulaire et de Morphologie, Lausanne, Switzerland

Graham W Knott

To whom correspondence should be addressed. E-mail: Graham.Knott@unil.ch

Affiliation Départment de Biologie Cellulaire et de Morphologie, Lausanne, Switzerland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

EW and GWK conceived and designed the experiments. CG, CQ, PS, HH, and GWK performed the experiments. CG, CQ, PS, and HH analyzed the data. HH and EW contributed reagents/materials/analysis tools. GWK wrote the paper.