2WTL:
reference: Crystal structure of Bfr A from Mycobacterium tuberculosis: incorporation of selenomethionine results in cleavage and demetallation of haem., Gupta V, Gupta RK, Khare G, Salunke DM, Tyagi AK, PLoS One. 2009 Nov 25;4(11):e8028. PMID: 19946376

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