Fig. 3
From: A promiscuous cytochrome P450 aromatic O-demethylase for lignin bioconversion

Crystal structure of GcoB. a The three-domain structure of GcoB is shown with electron transport cofactors. The N-terminal 2Fe-2S domain is shown in dark blue, followed by the FAD-binding domain in cyan, and the NADH-binding domain in light blue. b The 2Fe-2S cluster is held in an H-bonded basket coordinated by four Cys residues. c, d The FAD is accommodated by hydrophobic stacking interactions between Phe330 and the flavin isoalloxazine moiety. e A diagrammatic representation of the GcoAB domain organization