Research ArticleStructural Biology View ORCID ProfileAlise R. Muok1,2, View ORCID ProfileTeck Khiang Chua1, View ORCID ProfileMadhur Srivastava1,3, Wen Yang2, View ORCID ProfileZach Maschmann1, Petr P. Borbat1,3, View ORCID ProfileJenna Chong1, View ORCID ProfileSheng Zhang1, View ORCID ProfileJack H. Freed1,3, View ORCID ProfileAriane Briegel2, and View ORCID ProfileBrian R. Crane1,* 1Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.