3J9O:
reference: Atomic Structure of T6SS Reveals Interlaced Array Essential to Function., Clemens DL, Ge P, Lee BY, Horwitz MA, Zhou ZH, Cell. 2015 Feb 26;160(5):940-51. doi: 10.1016/j.cell.2015.02.005. PMID: 25723168

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