1NY9:
reference: Structural basis for antibiotic recognition by the TipA class of multidrug-resistance transcriptional regulators., Kahmann JD, Sass HJ, Allan MG, Seto H, Thompson CJ, Grzesiek S, EMBO J 2003 Apr 15;22(8):1824-34. PMID: 12682015

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