How/where does carbon monoxide (CO) bind to hemoglobin? How/where does carbon dioxide (CO2) bind to hemoglobin? Based...
How/where does carbon monoxide (CO) bind to hemoglobin? How/where does carbon dioxide (CO2) bind to hemoglobin? Based on this information, identify each as a homotropic or heterotropic allosteric modulator. Explain your choice.
Homework Answers
Carbon monoxide binds to hemoglobin at heme groups. There are 4
heme groups in hemoglobin. This is the site where the oxygen binds,
but carbon monoxide have more affinity towards hemoglobin than
oxygen.
carbon dioxide binds to 
-amino groups of hemoglobin. The four protein chains of hemoglobin
have four terminal amino groups. Carbon dioxide binds to amino
groups and form carbaminohemoglobin.
CO is the homotropic allosteric modulator of hemoglobin because it acts as the regulatory molecule for hemoglobin activity and also acts ais the substrate for hemoglobin.
CO2 is heterotrophic allosteric modulator because it is not the substrate for hemoglobin and acts as the inhibitor for hemoglobin.
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How/where does carbon monoxide (CO) bind to hemoglobin?
How/where does carbon dioxide (CO2) bind to
hemoglobin? Based...
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Carbon monoxide (CO) is toxic because it binds more strongly to the iron in hemoglobin (Hb) than does oxygen (O2), as i...
Carbon monoxide (CO) is toxic because it binds more strongly to the iron in hemoglobin (Hb) than does oxygen (O2), as indicated by these approximate standard free-energy changes in blood: Hb+O2=HbO2 Delta G= -70 kJ/mol Hb+CO=HbCO Delta G= -80 kJ/mol Part A Estimate the equilibrium constant K at 298 K for the equilibrium HbO2+CO==HbCO+O_2
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