1. Department
of Chemistry, Stony Brook University, 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. Central
Laser Facility, Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, U.K.
5. Department
Chemie, Technische Universität München, D-85747 Garching, Germany
6. Institut
für Biochemie und Lebensmittelchemie, Universität Hamburg, Grindelallee 117, D-20146 Hamburg, Germany