1QPW:
reference: Structure determination of porcine haemoglobin., Lu TH, Panneerselvam K, Liaw YC, Kan P, Lee CJ, Acta Crystallogr D Biol Crystallogr 2000 Mar;56 ( Pt 3):304-12. PMID: 10713517

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