5K9T:
reference: An alternate mode of oligomerization for E. coli SecA., Yazdi AK, Vezina GC, Shilton BH, Sci Rep. 2017 Sep 18;7(1):11747. doi: 10.1038/s41598-017-11648-5. PMID: 28924213

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