1. Institute of Microbiology; Academy of Sciences; Opatovický mlýn 37981 Třeboň Czech Republic
2. Faculty of Sciences; University of South Bohemia; Branišovská 31 37005 České Budějovice Czech Republic
3. Institute of Microbiology; Academy of Sciences; Vídeňská 1083 14220 Prague 4 Czech Republic
4. Department of Biochemistry; Faculty of Science; Charles University in Prague; Hlavova 8 128 43 Prague Czech Republic