1. Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo nam. 2 16610 Prague 6 Czech Republic
2. First Faculty of Medicine Charles University Katerinská 32 12108 Prague 2 Czech Republic
3. Structural Virology Central European Institute of Technology Masaryk University Kamenice 753/5 62500 Brno Czech Republic
4. Institute of Molecular Genetics of the Czech Academy of Sciences 14220 Prague Czech Republic
5. Department of Molecular Biology and Genetics Faculty of Science University of South Bohemia Branisovska 1760 37005 České Budějovice Czech Republic
6. University of Chemistry and Technology 16628 Prague Czech Republic