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In deoxy hemoglobin (Hb), the Fe (II) is coordinated to | |
A. | four nitrogens of heme, the proximal His, and a water molecule [Correct Answer] |
B. | four nitrogens of heme and to a water molecule [Wrong Answer] |
C. | two nitrogens of heme and to three His residues in Hb [Wrong Answer] |
D. | two nitrogens of heme and to three water molecules [Wrong Answer] |