1. Department of Applied Chemistry, University of South Bohemia, Branišovská 31, 370 05 České Budějovice, Czech Republic
2. Laboratory of Molecular Structure Characterization, Institute of Microbiology, The Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague 4, Czech Republic
3. Laboratory of Analytical Biochemistry, Biology Centre, The Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic