1. Department of Structural Biology; Max Planck Institute of Biophysics; Frankfurt am Main Germany
2. School of Chemistry and the Photon Science Institute; University of Manchester; UK
3. Biogeochemistry Department; Max Planck Institute for Chemistry; Mainz Germany
4. Department of Microbiology; University of Regensburg; Germany
5. Department of Structural Biology; University of Regensburg; Germany