2BFA:
reference: Structures of Leishmania major pteridine reductase complexes reveal the active site features important for ligand binding and to guide inhibitor design., Schuttelkopf AW, Hardy LW, Beverley SM, Hunter WN, J Mol Biol. 2005 Sep 9;352(1):105-16. PMID: 16055151

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