1. Institute of Pharmaceutical Sciences, ETH Zurich, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland
2. Department of Molecular Life Sciences and SIB Swiss Institute of Bioinformatics, University of Zurich, 8057, Zurich, Switzerland
3. Biozentrum, University of Basel, 4056 Basel, Switzerland
4. Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA