1. Department
of Genetics and Microbiology, Faculty of Science, Charles University, Vinicna 5, 128 44 Prague 2, Czech Republic
2. Institute of Organic Chemistry and Biochemistry of the CAS, v.v.i., Flemingovo nam. 2, 166 10, Prague 6, Czech Republic
3. First
Faculty of Medicine, Charles University, Katerinska 32, 121 08, Prague 2, Czech Republic