Affiliation: | 1. Centre for Structural Systems Biology (CSSB), DESY, Notkestrasse 85, 22607 Hamburg, Germany;2. European Molecular Biology Laboratory Hamburg, Notkestrasse 85, 22607 Hamburg, Germany;3. Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Scheeles väg 2, 17177 Stockholm, Sweden |