1. Institute of Microbiology & Archaea Centre, Single-Molecule Biochemistry Lab, University of Regensburg , 93053 Regensburg , Germany
2. Division of Genome Sciences and Cancer, The John Curtin School of Medical Research, The Australian National University , Canberra, ACT 2601 , Australia
3. Regensburg Center of Biochemistry (RCB), University of Regensburg , 93053 Regensburg , Germany