4TR5:
reference: C3larvin toxin, an ADP-ribosyltransferase from Paenibacillus larvae., Krska D, Ravulapalli R, Fieldhouse RJ, Lugo MR, Merrill AR, J Biol Chem. 2014 Dec 4. pii: jbc.M114.589846. PMID: 25477523

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