1WWR:
reference: Crystal Structure of tRNA Adenosine Deaminase (TadA) from Aquifex aeolicus., Kuratani M, Ishii R, Bessho Y, Fukunaga R, Sengoku T, Shirouzu M, Sekine SI, Yokoyama S, J Biol Chem 2005 Apr 22;280(16):16002-16008. Epub 2005 Jan 26. PMID: 15677468

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