About the Authors
Sars Centre for Marine Molecular Biology, University of Bergen, Bergen, Norway
Department of Molecular Evolution and Development, Centre of Organismal Systems Biology, Faculty of Life Sciences, University of Vienna, Vienna, Austria
The authors have declared that no competing interests exist.
The author(s) have made the following declarations about their contributions: Commented on the manuscript: LL UT. Conceived and designed the experiments: CS UT FR. Performed the experiments: CS HB LL FR. Analyzed the data: CS LL FR. Wrote the paper: CS FR.