1. Institute of Macromolecular Chemistry; Czech Academy of Sciences; Heyrovského nám. 2 162 06 Prague 6 Czech Republic
2. Institute of Molecular Genetics; Czech Academy of Sciences; Flemingovo nám. 2 166 10 Prague 6 Czech Republic
3. Institute of Microbiology; Czech Academy of Sciences; Vídeňská 1083 142 20 Prague 4 Czech Republic