3NE8:
reference: A conformational switch controls cell wall-remodelling enzymes required for bacterial cell division., Yang DC, Tan K, Joachimiak A, Bernhardt TG, Mol Microbiol. 2012 Aug;85(4):768-81. doi: 10.1111/j.1365-2958.2012.08138.x. Epub, 2012 Jul 11. PMID: 22715947

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