4JBN:
reference: Molecular basis of ligand recognition by OASS from E. histolytica: insights from structural and molecular dynamics simulation studies., Raj I, Mazumder M, Gourinath S, Biochim Biophys Acta. 2013 Oct;1830(10):4573-83. doi:, 10.1016/j.bbagen.2013.05.041. Epub 2013 Jun 6. PMID: 23747298

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