3S48:
reference: The structure of alpha-haemoglobin in complex with a haemoglobin-binding domain from Staphylococcus aureus reveals the elusive alpha-haemoglobin dimerization interface., Krishna Kumar K, Jacques DA, Guss JM, Gell DA, Acta Crystallogr F Struct Biol Commun. 2014 Aug 1;70(Pt 8):1032-7. doi:, 10.1107/S2053230X14012175. Epub 2014 Jul 23. PMID: 25084376

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