2VBQ:
reference: Kinetic and structural analysis of bisubstrate inhibition of the Salmonella enterica aminoglycoside 6'-N-acetyltransferase., Magalhaes ML, Vetting MW, Gao F, Freiburger L, Auclair K, Blanchard JS, Biochemistry. 2008 Jan 15;47(2):579-84. Epub 2007 Dec 21. PMID: 18095712

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