1. Research Institute of Brewing and Malting, Lípová 15, CZ-120 44 Prague 2, Czech Republic
2. Research Institute of Brewing and Malting, Mostecká 971/7, CZ-614 00 Brno, Czech Republic
3. Biotechnology Department, University of São Paulo, Av. Professor Lineu Prestes, 2415 São Paulo, Brazil
4. Faculty of Science, Charles University, Albertov 6, CZ-128 43 Prague 2, Czech Republic