4IRO:
reference: Role of tertiary structures on the Root effect in fish hemoglobins., Ronda L, Merlino A, Bettati S, Verde C, Balsamo A, Mazzarella L, Mozzarelli A, Vergara A, Biochim Biophys Acta. 2013 Feb 1. pii: S1570-9639(13)00042-3. doi:, 10.1016/j.bbapap.2013.01.031. PMID: 23376186

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