6HSV:
reference: Directed assembly of homo-pentameric cholera toxin B-subunit proteins into higher-order structures using coiled-coil appendages., Ross JF, Wildsmith GC, Johnson M, Hurdiss D, Hollingsworth K, Thompson RF, Mosayebi M, Trinh CH, Paci E, Pearson AR, Webb ME, Turnbull WB, J Am Chem Soc. 2019 Mar 11. doi: 10.1021/jacs.8b11480. PMID: 30856321

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