3LTW:
reference: Probing the architecture of the Mycobacterium marinum arylamine N-acetyltransferase active site., Abuhammad AM, Lowe ED, Fullam E, Noble M, Garman EF, Sim E, Protein Cell. 2010 Apr;1(4):384-92. Epub 2010 May 8. PMID: 21203950

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