1. Department of Chemistry, Bowdoin College, Brunswick, Maine 04011, United States
2. Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060,
United States
3. Department of Molecular & Cell Biology, University of Connecticut, Storrs, Connecticut 06269-3125, United States
4. Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts
02139, United States
5. Institute
of Physics and Biophysics,
Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic