4AVD:
reference: High Resolution Crystal Structures of the Cerebratulus lacteus Mini-Hb in the Unligated and Carbomonoxy States., Germani F, Pesce A, Venturini A, Moens L, Bolognesi M, Dewilde S, Nardini M, Int J Mol Sci. 2012;13(7):8025-37. doi: 10.3390/ijms13078025. Epub 2012 Jun 28. PMID: 22942687

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