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Which of the following correctly describes the structure of normal hemoglobin A (Hb A)?

matt898967

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Which of the following correctly describes the structure of normal hemoglobin A (Hb A)?

Which of the following correctly describes the structure of normal hemoglobin A (Hb A)?

a. Four identical polypeptide chains, each containing two heme groups
b. Two a and two b polypeptide chains, each containing one heme group
c. Conjugated protein with 141 amino acids, containing two atoms of iron
d. Two d and two g polypeptide chains, each containing a single heme group

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