4P1C:
reference: Structural basis for biomolecular recognition in overlapping binding sites in a diiron enzyme system., Acheson JF, Bailey LJ, Elsen NL, Fox BG, Nat Commun. 2014 Sep 24;5:5009. doi: 10.1038/ncomms6009. PMID: 25248368

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