1. Department of General Microbiology; Institute of Microbiology and Genetics; Georg-August-University Göttingen; Grisebachstr. 8 Göttingen D-37077 Germany
2. Department for Plant Biochemistry; Albrecht-von-Haller-Institute for Plant Sciences; Georg-August-University Göttingen; Grisebachstr. 8 Göttingen D-37077 Germany
3. Interfaculty Institute for Genetics and Functional Genomics; University Medicine Greifswald; Friedrich-Ludwig-Jahnstr. 15a Greifswald D-17475 Germany