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Figure 2.
The edge metal-binding site. The Mg^2+-bound form (A), the
Co^2+-bound form (B), and the Ca^2+-bound form (C) bind a
divalent metal ion each with octahedral geometry. The |F[o]| –
|F[c]| omit electron density map of the Mg^2+-bound form is
contoured at 4.5σ. The anomalous difference peaks of the Co^2+-
and the Ca^2+-bound forms were contoured at 5σ and 3σ,
respectively.
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