Bisphosphoglycerate (BPG) cannot bind to the oxygenated R state of hemoglobin be

Question

Bisphosphoglycerate (BPG) cannot bind to the oxygenated R state of hemoglobin because

Options:

A . it is displaced from the heme by oxygen

B . its binding pocket becomes too small to accommodate BPG

C . it is displaced from the heme by movement of the proximal histidine

D . BPG binds to the R state with the same affinity as the T state

Answer: Option B

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