1 Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045, United States.
2 Department of Chemical and Physical Sciences, University of Toronto, Mississauga, Canada; Departments of Chemistry and Cell & Systems Biology, University of Toronto, Canada.
3 University of Bordeaux, CNRS, Bordeaux INP, CBMN UMR5248, Pessac, France.
4 Institute of Biological Information Processing: Structural Biochemistry, Forschungszentrum Jülich, Jülich, Germany; Institute of Theoretical and Computational Chemistry, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany. Electronic address: b.strodel@fz-juelich.de.