1S5Y:
reference: The oxidation process of Antarctic fish hemoglobins., Vitagliano L, Bonomi G, Riccio A, di Prisco G, Smulevich G, Mazzarella L, Eur J Biochem 2004 May;271(9):1651-9. PMID: 15096204

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