5HBC:
reference: Structure of iron saturated C-lobe of bovine lactoferrin at pH 6.8 indicates a weakening of iron coordination., Rastogi N, Singh A, Singh PK, Tyagi TK, Pandey S, Shin K, Kaur P, Sharma S, Singh TP, Proteins. 2016 May;84(5):591-9. doi: 10.1002/prot.25004. Epub 2016 Feb 24. PMID: 26850578

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