 
			 
			MCQOPTIONS
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				| 1. | In deoxy hemoglobin (Hb), the Fe (II) is coordinated to | 
| A. | four nitrogens of heme, the proximal His, and a water molecule | 
| B. | four nitrogens of heme and to a water molecule | 
| C. | two nitrogens of heme and to three His residues in Hb | 
| D. | two nitrogens of heme and to three water molecules | 
| Answer» B. four nitrogens of heme and to a water molecule | |