5KIU:
reference: Structural basis for nucleotide-modulated p97 association with the ER membrane., Tang WK, Zhang T, Ye Y, Xia D, Cell Discov. 2017 Dec 12;3:17045. doi: 10.1038/celldisc.2017.45. eCollection, 2017. PMID: 29238611

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