The Graph Below Shows the O₂-Binding Curves for Myoglobin (Mb)and

question 59

Essay

The graph below shows the O₂-binding curves for myoglobin (Mb)and hemoglobin (Hb).
a.Label the two curves (indicate which one represents Mb and which one represents Hb).
b.Use the graph to determine the K_d of myoglobin for O₂ (show your approach).
c.What is the difference between myoglobin and hemoglobin that cause the O₂-binding curves to so be different?
d.Why is it important that hemoglobin has these particular O₂-binding characteristics?

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Definitions:

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