When oxygen is bound to one hemoglobin subunit, contacts between side chains in the other hemoglobin subunits change.
The quaternary structure of hemoglobin. It is made up of two distinct protein pairs called the and chains. The and chains of hemoglobin contain 141 and 146 amino acids, respectively.
The Quaternary Structure. Multiple polypeptide chains are arranged within the same molecule to form the quaternary structure. As one hemoglobin molecule consists of four subunits, it is referred to as a tetramer. It is believed that the hemoglobin tetramer is made up of two identical dimers.
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