1. Laboratory of Structural Biochemistry, Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany.
2. Research Center of Electron Microscopy and Core Facility BioSupraMol, Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany.
3. Department of Microbiology and Center for RNA Biology, The Ohio State University, Columbus, OH, USA.
4. Laboratory of Transcription, Centre for DNA Fingerprinting and Diagnostics, Hyderabad, India.
5. Graduate Studies, Regional Centre for Biotechnology, Faridabad, Haryana, India.
6. Microscopy and Cryo-Electron Microscopy Service Group, Max-Planck-Institut für Molekulare Genetik, Berlin, Germany.
7. Institute of Medical Physics und Biophysics, Charité–Universitätsmedizin Berlin, Berlin, Germany.
8. Department of Biochemistry, University of Turku, FIN-20014 Turku, Finland.
9. Macromolecular Crystallography, Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany.