4MT4:
reference: Crystal structure of the Campylobacter jejuni CmeC outer membrane channel., Su CC, Radhakrishnan A, Kumar N, Long F, Bolla JR, Lei HT, Delmar JA, Do SV, Chou TH, Rajashankar KR, Zhang Q, Yu EW, Protein Sci. 2014 Jul;23(7):954-61. doi: 10.1002/pro.2478. Epub 2014 May 6. PMID: 24753291

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