Allosteric Effects
A protein that shows infinite cooperative for binding of n ligands will

only be found in either the unliganded form or the fully liganded form
both (b) and (c)
show a Hill coefficient (nH) of 0.0
show a Hill coefficient (nH) of n

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Allosteric Effects
The conformational changes from the T to the R state is initiated by

movement of the proximal histidine towards the heme
movement of the F-helix, which contains the proximal His
reorganization of protein-protein contacts between the individual subunits
binding of oxygen to the heme

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Allosteric Effects
O2 binding to hemoglobin results in

100-fold higher affinity for the last O2 bound than for the first
extensive protein conformational change
both (a) and (b)
100-fold lower affinity for the last O2 bound than for the first

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