6APY:
reference: Characterization of the catalytic signature of Scabin toxin, a DNA-targeting ADP-ribosyltransferase., Lyons B, Lugo MR, Carlin S, Lidster T, Merrill AR, Biochem J. 2017 Dec 5. pii: BCJ20170818. doi: 10.1042/BCJ20170818. PMID: 29208763

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