1. Department
of Chemistry, University of Eastern Finland, Joensuu Campus, FI-80101 Joensuu, Finland
2. Institute
of Complex Systems, Structural Biochemistry (ICS-6), Forschungszentrum
Jülich GmbH, 52425 Jülich, and Institut für Physikalische
Biologie, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
3. Institut Laue-Langevin, 71 Avenue des Martyrs, 38000 Grenoble, France
4. Robert
Frederick
Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853-5021, United States