6N3Q:
reference: Structure of the posttranslational Sec protein-translocation channel complex from yeast., Itskanov S, Park E, Science. 2018 Dec 13. pii: science.aav6740. doi: 10.1126/science.aav6740. PMID: 30545845

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