1. Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.
2. School of Pharmacy, Institute of Clinical Sciences, University of Birmingham, Birmingham B15 2TT, U.K.
3. Department of Biophysics, Faculty of Science, Palacky University, 17 listopadu 12, Olomouc CZ-77146, Czech Republic
4. Institute of Biophysics, Czech Academy of Sciences, Kralovopolska 135, Brno CZ-61265, Czech Republic