1. Department of Biochemistry, University of Washington, Seattle, Washington 98195, United States
2. Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
3. Howard Hughes Medical Institute, University of Washington, Seattle, Washington 98195, United States
4. Transdisciplinary Research Area “Building Blocks of Matter and Fundamental Interactions (TRA Matter)”, University of Bonn, Bonn, 53113, Germany
5. Life and Medical Sciences Institute, University of Bonn, Bonn, 53113, Germany