1. Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic