4O8S:
reference: Crystal Structure Confirmation of JHP933 as a Nucleotidyltransferase Superfamily Protein from Helicobacter pylori Strain J99., Zhao Y, Ye X, Su Y, Sun L, She F, Wu Y, PLoS One. 2014 Aug 7;9(8):e104609. doi: 10.1371/journal.pone.0104609. eCollection, 2014. PMID: 25101777

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