1. Department of Botany, Faculty of Science, Charles University, Prague, Czech Republic
2. Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ-14220, Prague, Czech Republic
3. EMSL Analytical, Inc., 200 Route 130 North, Cinnaminson, New Jersey 08077
4. US Department of Agriculture, National Center for Agricultural Utilization Research, Agricultural Research Service, Peoria, Illinois 61604