5ELJ:
reference: Generation of specific inhibitors of SUMO-1- and SUMO-2/3-mediated protein-protein interactions using Affimer (Adhiron) technology., Hughes DJ, Tiede C, Penswick N, Tang AA, Trinh CH, Mandal U, Zajac KZ, Gaule T, Howell G, Edwards TA, Duan J, Feyfant E, McPherson MJ, Tomlinson DC, Whitehouse A, Sci Signal. 2017 Nov 14;10(505). pii: 10/505/eaaj2005. doi:, 10.1126/scisignal.aaj2005. PMID: 29138295

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).