1. Department of Biology, Brandon University, Brandon, MB R7A 6A9, Canada
2. Texas Therapeutics Institute, The Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, 1881 East Road, Houston, Texas 77054
3. Institute of Microbiology, Czech Academy of Sciences, Prague 142 20, Czech Republic
4. Department of Taxonomy, Institute of Botany, Czech Academy of Sciences, Czech Republic