Which of the following is NOT correct concerning myoglobin? A) The globin chain contains an extensive α-helix structure. B) The heme group is bound to the globin chain by two disulfide bonds to cysteine residues. C) The iron of the heme group is in the Fe²⁺ oxidation state. D) The diameter of the iron ion decreases upon binding to oxygen. E) The function of myoglobin is oxygen storage in muscle.

Question

Quizplus · Accepted Answer

The heme group in myoglobin is not bound to the globin chain by disulfide bonds to cysteine residues. Instead, it is held in place by coordination to a histidine residue and hydrophobic interactions.

Which of the Following Is NOT Correct Concerning Myoglobin