1GXZ:
reference: Structure of the ecto-ADP-ribosyl transferase ART2.2 from rat., Mueller-Dieckmann C, Ritter H, Haag F, Koch-Nolte F, Schulz GE, J Mol Biol 2002 Sep 27;322(4):687-96. PMID: 12270706

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