6MRT:
reference: High-resolution cryo-EM structures of the E. coli hemolysin ClyA oligomers., Peng W, de Souza Santos M, Li Y, Tomchick DR, Orth K, PLoS One. 2019 May 2;14(5):e0213423. doi: 10.1371/journal.pone.0213423., eCollection 2019. PMID: 31048915

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