1. Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, Prague 142 00, Czech Republic
2. Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 5, Prague 166 28, Czech Republic
3. Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 542, Prague 160 00, Czech Republic
4. Department of Clinical Microbiology and ATB Center, Institute of Medical Biochemistry and Laboratory Diagnostics of the General University Hospital and of The First Faculty of Medicine of Charles University, U Nemocnice 2, Prague 2 128 08, Czech Republic