1 Department of Structural and Computational Biology, Max F. Perutz Laboratories, University of Vienna Vienna Biocenter Campus 5 A-1030 Vienna Austria.
2 Biological and Chemical Research Centre, Faculty of Chemistry, University of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland.
3 Institute of Organic Chemistry, University of Vienna Währinger Strasse 38 A-1090 Vienna Austria.
4 Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo nam. 2 160 00 Prague Czech Republic [email protected][email protected].