1. Institut
für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße
2, D-12489 Berlin, Germany
2. Case
Western Reserve University Center for Synchrotron Biosciences and
Center for Proteomics and Bioinformatics, National Synchrotron Light
Source, Brookhaven National Laboratory, Upton, New York 11973, United States
3. Department
of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza
della Scienza 1, 20126 Milan, Italy