6HCK:
reference: Control of Bacterial Virulence through the Peptide Signature of the Habitat., Krypotou E, Scortti M, Grundstrom C, Oelker M, Luisi BF, Sauer-Eriksson AE, Vazquez-Boland J, Cell Rep. 2019 Feb 12;26(7):1815-1827.e5. doi: 10.1016/j.celrep.2019.01.073. PMID: 30759392

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