6CL5:
reference: Structure and Analysis of R1 and R2 Pyocin Receptor-Binding Fibers., Buth SA, Shneider MM, Scholl D, Leiman PG, Viruses. 2018 Aug 14;10(8). pii: v10080427. doi: 10.3390/v10080427. PMID: 30110933

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