Fig. 6.

Structures of sMMO. (A) M. capsulatus (Bath) MMOH (PDB accession code 1MTY). The α subunits are shown in gray, the β subunits are shown in pink, and the γ subunits are shown in yellow. The iron ions are shown as orange spheres with the ligands shown as sticks. (B) M. capsulatus (Bath) MMOH-MMOB complex (PDB accession code 4GAM). MMOB is shown in dark blue. (C) M. sporium strain 5 MMOH-MMOD complex (PDB accession code 6D7K). MMOD is shown in orange.