6EPI:
reference: The ng_zeta1 toxin of the gonococcal epsilon/zeta toxin/antitoxin system drains precursors for cell wall synthesis., Rocker A, Peschke M, Kittila T, Sakson R, Brieke C, Meinhart A, Nat Commun. 2018 Apr 27;9(1):1686. doi: 10.1038/s41467-018-03652-8. PMID: 29703974

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