1CQX:
reference: Crystal structure of the flavohemoglobin from Alcaligenes eutrophus at 1.75 A resolution., Ermler U, Siddiqui RA, Cramm R, Friedrich B, EMBO J 1995 Dec 15;14(24):6067-77. PMID: 8557026

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