1. Structural Plant Biology Laboratory, Department of Botany and Plant Biology, University of Geneva, Geneva, Switzerland.
2. Department of Biochemistry, University of Lausanne, Lausanne, Switzerland.
3. Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland.
4. Department of Biochemistry, Max Planck Institute for Developmental Biology, Tübingen, Germany.
5. Department of Chemistry and Pharmacy, University of Zürich, Zürich, Switzerland.
6. Medical Research Council Laboratory for Molecular Cell Biology, University College London, London, UK.
7. Institute of Organic Chemistry, Albert-Ludwigs-University Freiburg, Freiburg, Germany.