1. Department of Pharmaceutical Sciences, University of Kentucky, Lexington, Kentucky 40508, United States
2. Department of Structural Biology, St. Jude Children’s Research Hospital, Memphis, Tennessee 38105, United States
3. Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, Tennessee 38105, United States
4. Department of Surgery, Laboratory of Epithelial Cancer Biology, Memorial Sloan Kettering Cancer Center, New York New York 10065, United States
5. Department of Molecular Machines and Signaling, Max Planck Institute of Biochemistry, Martinsried 82152, Germany