1. Division of Biophysics, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, Warsaw 02-093, Poland
2. Centre of New Technologies, University of Warsaw, Banacha 2C, Warsaw 02-097, Poland
3. Department of Pharmaceutical Chemistry, University of California, San Francisco, California 94158, United States
4. Department of Chemistry & Biochemistry, University of Delaware, Newark, Delaware 19716, United States