Institute of Microbiology and Genetics, University of Göttingen, Goldschmidtstr, 1, 37077 Göttingen, Germany. ingobulla@gmail.com|Institute of Microbiology and Genetics, University of Göttingen, Goldschmidtstr, 1, 37077 Göttingen, Germany. ingobulla@gmail.com|Institute of Microbiology and Genetics, University of Göttingen, Goldschmidtstr, 1, 37077 Göttingen, Germany. ingobulla@gmail.com|Institute of Microbiology and Genetics, University of Göttingen, Goldschmidtstr, 1, 37077 Göttingen, Germany. ingobulla@gmail.com|Institute of Microbiology and Genetics, University of Göttingen, Goldschmidtstr, 1, 37077 Göttingen, Germany. ingobulla@gmail.com|Institute of Microbiology and Genetics, University of Göttingen, Goldschmidtstr, 1, 37077 Göttingen, Germany. ingobulla@gmail.com