5. Which of the following is incorrect to describe myoglobin (Mb) and hemoglobin (Hb)?
(A) The R-form and T-form of the Hb differ at their salt bridges, H-bonds and covalent linkages between subunits
(B) Oxygen binding curve of Hb becomes closer to that of Mb in the absence of CO2 and BPG.
(C) Oxygen binds to a ferrous ion of the heme in both proteins.
(D) At low pH values, the population of R-form is less than the T-from of Hb.
(E) Hb can carry CO2 but at different site from the one that binds CO and O2.
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