Department of General Microbiology, Georg-August University Göttingen, Grisebachstr. 8, 37077 Göttingen, Germany.|Department of General Microbiology, Georg-August University Göttingen, Grisebachstr. 8, 37077 Göttingen, Germany.|Department of General Microbiology, Georg-August University Göttingen, Grisebachstr. 8, 37077 Göttingen, Germany.|Department of General Microbiology, Georg-August University Göttingen, Grisebachstr. 8, 37077 Göttingen, Germany.