In deoxy hemoglobin (Hb), the Fe (II) is coordinated to

Question - In deoxy hemoglobin (Hb), the Fe (II) is coordinated to

Options:

A . four nitrogens of heme and to a water molecule

B . four nitrogens of heme, the proximal His, and a water molecule

C . two nitrogens of heme and to three water molecules

D . two nitrogens of heme and to three His residues in Hb

Answer: Option B

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