1. Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000, Prague 6, Czech Republic
2. Lab. of Microbial Genetics and Gene Expression, Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, CZ-14220, Prague 4, Czech Republic
3. Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 8, CZ-12843, Prague 2, Czech Republic