1. Chemistry Department, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
2. Polyphor AG, Hegenheimermattweg 125, 4123 Allschwil, Switzerland.
3. Functional Genomics Center Zürich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
4. Center for Microscopy and Image Analysis, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
5. Department of Microbiology, University of Zurich, Winterthurerstrasse 190, 8057 Zurich.