The Structure of Myoglobin, as Determined by X-Ray Diffraction, Exhibits

question 31

Multiple Choice

The structure of myoglobin, as determined by x-ray diffraction, exhibits all of the following EXCEPT which one?

• A) The heme group is tucked into a pocket or cleft of the myoglobin molecule.
• B) The myoglobin molecule has almost the same alpha helical content as the individual subunits of the hemoglobin molecule.
• C) The myoglobin molecule has a very similar tertiary structure to the individual subunits of the hemoglobin molecule.
• D) There is almost no water in the interior of the molecule.
• E) The heme iron is linked to a tyrosine residue at its fifth coordination position.

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