3ESS:
reference: Yeast as a tool for characterizing mono-ADP-ribosyltransferase toxins., Turgeon Z, White D, Jorgensen R, Visschedyk D, Fieldhouse RJ, Mangroo D, Merrill AR, FEMS Microbiol Lett. 2009 Nov;300(1):97-106. Epub 2009 Aug 31. PMID: 19793133

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