1 Department of Chemistry, Faculty of Science, University of South Bohemia, Branisovska 31a, 37005, Ceske Budejovice, Czech Republic.
2 Department of Medical Biology, Faculty of Science, University of South Bohemia, Branisovska 31a, 37005, Ceske Budejovice, Czech Republic.
3 Biology Centre of the Czech Academy of Sciences, Institute of Parasitology, 37005, Ceske Budejovice, Czech Republic.
4 Department of Chemistry, Faculty of Science, University of South Bohemia, Branisovska 31a, 37005, Ceske Budejovice, Czech Republic. sterbaj@prf.jcu.cz.