4FXB:
reference: Crystal structure of cytochrome P450 CYP105N1 from Streptomyces coelicolor, an oxidase in the coelibactin siderophore biosynthetic pathway., Lim YR, Hong MK, Kim JK, Doan TT, Kim DH, Yun CH, Chun YJ, Kang LW, Kim D, Arch Biochem Biophys. 2012 Sep 18;528(2):111-117. doi: 10.1016/j.abb.2012.09.001. PMID: 23000034

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