1TKL:
reference: Crystal structure of the oxygen-dependent coproporphyrinogen oxidase (odCPO/Hem13p) of Saccharomyces cerevisiae., Phillips JD, Whitby FG, Warby CA, Labbe P, Yang C, Pflugrath JW, Ferrara JD, Robinson H, Kushner JP, Hill CP, J Biol Chem 2004 Jun 12;. PMID: 15194705

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