1. Leibniz Institute for Natural Product Research and Infection Biology; Hans Knöll Institute; Beutenbergstraße 11a 07745 Jena Germany
2. Molecular and Cell Biology; University of Connecticut; 91 North Eagleville Road Storrs CT 06269-3125 USA
3. Leibniz Institute DSMZ; German Collection of Microorganisms and Cell Cultures; Inhoffenstraße 7B 38124 Braunschweig Germany
4. Institute of Inorganic and Analytical Chemistry; Friedrich-Schiller-University Jena; Lessingstraße 8 07743 Jena Germany
5. Department of Microbiology and Plant Pathology, Forestry and Agriculture Biotechnology Institute; University of Pretoria; Pretoria South Africa
6. Centre for Social Evolution; University of Copenhagen; 2100 Copenhagen East Denmark