1. Faculty of Biology and BiotechnologyMicrobial BiotechnologyRuhr-Universität Bochum Universitätsstrasse 150 44780 Bochum Germany
2. Environmental MicrobiologyTU Bergakademie Freiberg Leipziger Strasse 29 09599 Freiberg Germany
3. Present address: BRAIN AG Darmstädter Strasse 34 64673 Zwingenberg Germany
4. Department of BiotechnologyDelft University of Technology Van der Maasweg 9 2629 HZ Delft The Netherlands