Which of the Following Occurs When Hemoglobin Switches from the T

question 3

Multiple Choice

Which of the following occurs when hemoglobin switches from the T (deoxy) state to the R (oxy) state?

• A)the heme group goes from a slightly puckered conformation to a flat conformation
• B)the ferrous ion is pulled into the plane of the heme group
• C)the F8 (proximal)histidine rotates about 8^\(\circ\) to better align with the ferrous ion
• D)movement of the F8 histidine causes a shift in the F helix, thus weakening interactions with other subunits
• E)all of the above

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