1. Institute
of Physical Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057
Zurich, Switzerland
2. Department of Biochemistry, University of Zurich, Winterthurerstrasse 190, CH-8057
Zurich, Switzerland
3. Department
of Bioengineering and
Therapeutic Sciences, University of California in San Francisco, 1700 Fourth Street, San Francisco, California
94158, United States