3AG0:
reference: Crystal structure of the carbon monoxide complex of human cytoglobin., Makino M, Sawai H, Shiro Y, Sugimoto H, Proteins. 2010 Nov 30. doi: 10.1002/prot.22950. PMID: 21254233

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