1. Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
2. School of Chemistry, University of East Anglia, Norwich NR4 7TJ, U.K.
3. Department of Biophysics, Medical School, University of Pecs, Szigeti ut 12, 7624 Pecs, Hungary
4. Institut für Biochemie und Lebensmittelchemie, Universität Hamburg, Grindelallee 117, D-20146 Hamburg, Germany
5. Department of Chemistry, Technical University of Munich, 85747 Garching, Germany