3E2J:
reference: Crystal structure of bovine mitochondrial factor B at 0.96-A resolution., Lee JK, Belogrudov GI, Stroud RM, Proc Natl Acad Sci U S A. 2008 Sep 9;105(36):13379-84. Epub 2008 Sep 3. PMID: 18768789

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