1B86:
reference: Human deoxyhaemoglobin-2,3-diphosphoglycerate complex low-salt structure at 2.5 A resolution., Richard V, Dodson GG, Mauguen Y, J Mol Biol 1993 Sep 20;233(2):270-4. PMID: 8377203

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