1. Department of Biotechnology; University of Chemistry and Technology Prague; Technicka 5 166 28 Prague Czech Republic
2. Department of Microbiology; Research Institute of Brewing and Malting; Lipova 15 120 44 Prague Czech Republic
3. Faculty of Science; J. E. Purkyně University; Ceske mladeze 8, 40096 Ústi nad Labem Czech Republic
4. Department of Dairy, Fat and Cosmetics; University of Chemistry and Technology Prague; Technicka 5 166 28 Prague Czech Republic