1. European Molecular Biology Laboratory, Structural and Computational Biology and Developmental Biology Units Meyerhofstrasse 1 69117 Heidelberg Germany
2. Institute of Biochemistry and Molecular Biology II, Heinrich‐Heine University Hospital Universitätsstrasse 1 40255 Düsseldorf Germany
3. Department of Structural Biology, Max‐Planck Institute of Molecular Physiology Otto‐Hahn‐Strasse 11 44227 Dortmund Germany