3CP2:
reference: Crystal structures of the conserved tRNA-modifying enzyme GidA: implications for its interaction with MnmE and substrate., Meyer S, Scrima A, Versees W, Wittinghofer A, J Mol Biol. 2008 Jul 11;380(3):532-47. Epub 2008 May 7. PMID: 18565343

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