5EMI:
reference: Enabling cell-cell communication via nanopore formation: structure, function, and localization of the unique cell wall amidase AmiC2 of Nostoc punctiforme., Buttner FM, Faulhaber K, Forchhammer K, Maldener I, Stehle T, FEBS J. 2016 Feb 1. doi: 10.1111/febs.13673. PMID: 26833702

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