1GXF:
reference: Two interacting binding sites for quinacrine derivatives in the active site of trypanothione reductase: a template for drug design., Saravanamuthu A, Vickers TJ, Bond CS, Peterson MR, Hunter WN, Fairlamb AH, J Biol Chem. 2004 Jul 9;279(28):29493-500. Epub 2004 Apr 21. PMID: 15102853

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