1. European Molecular Biology Laboratory (EMBL), Structural and Computational Biology Unit, Meyerhofstraße 1, 69117 Heidelberg, Germany.
2. Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons (ER-C-3/Structural Biology), Forschungszentrum Jülich, 52425 Jülich, Germany.
3. JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich, 52425 Jülich, Germany.
4. European Molecular Biology Laboratory (EMBL) Hamburg c/o DESY, Notkestraße 85, 22607 Hamburg, Germany.
5. Department of Chemistry, Heinrich Heine University, Universitätsstraße 1, 40225 Düsseldorf, Germany.