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Metal centers in Methylocystis sp. strain M pMMO. The copper sites in (A) and (B) were modeled as dinuclear and mononuclear, respectively. The Cu anomalous map (magenta, 5σ) is superposed on the 2Fo – Fc map (1.4σ). (C) The zinc site is solvent exposed. The Zn anomalous map (cyan, 4.5σ) is superposed on the 2Fo – Fc map (1.4σ). (D) The zinc site as modeled in the original M. capsulatus (Bath) pMMO structure. The pmoC and pmoA subunits are colored light pink and gray as in Figure 5.
