1. Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 40530 Gothenburg, Sweden
2. Department of Physics, Technical University of Denmark, 2800 Lyngby, Denmark
3. Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
4. Faculty of Physical Sciences, University of Iceland, VR-III, 107 Reykjavík, Iceland
5. Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
6. RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
7. Department of Chemical Physics, Lund University, Box 124, 22100 Lund, Sweden
8. Georg-August-Universität Göttingen, Institute for Microbiology and Genetics, Justus-von-Liebig-Weg 11, 37077 Göttingen, Germany