1. Department of Molecular Microbiology and Institute of Biomembranes; Utrecht University; Padualaan 8; 3584 CH; Utrecht; the Netherlands
2. Department of Medical Microbiology,; University Medical Center Utrecht; Heidelberglaan 100, G04.614; 3584 CX; Utrecht; the Netherlands
3. Department of Earth Sciences; Utrecht University; 3584 CD; Utrecht; the Netherlands