Match each of the structural elements of myoglobin or hemoglobin with its function below.
A. His F8
B. His E7
C. E and F helices
D. O2-Fe(II)
E. Val E11
F. α1-β1 interface/α2-β2 interface
G. oxymyoglobin/deoxymyoglobin
H. oxyhemoglobin/deoxyhemoglobin
I. α1-β2 interface/α2-β1 interface
J. C-terminal salt bridges
____ Forms a coordination bond with Fe(II)
____ Involved in the binding of heme
____ Partially occludes the O2-binding site
____ Conformations are nearly superimposable
____ Forms a hydrogen bond with O2
____ Is associated with a rotational shift of the hemoglobin α1β1 dimer with respect to the α2β2 dimer.
____ Disrupts the N- and C-terminal salt bridges in hemoglobin
____ Stabilizes the T state
____ Involved in the interactions of hemoglobin subunits