6ND1:
reference: Structure of the post-translational protein translocation machinery of the ER membrane., Wu X, Cabanos C, Rapoport TA, Nature. 2018 Dec 31. pii: 10.1038/s41586-018-0856-x. doi:, 10.1038/s41586-018-0856-x. PMID: 30644436

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