Question

Quaternary structure of protein hemoglobin

Answer 1

Hello friend
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This is a Quaternary structure and hemoglobin have a Quaternary structure. The hemoglobin molecule is an assembly of four globular protein subunits.

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Answer 2

Answer:

Quaternary structure is the relative folding of two or more similar or dissimilar polypeptides upon one another. Example- hemoglobin.

Explanation:

• Hemoglobin has four polypeptide chains that are joined by non-covalent bonds. It contains a heme prosthetic group. Heme is an iron-containing porphyrin derivative.
• The adult hemoglobin has two α and two β chains. Each α-chain is formed of 141 amino acid residues, while each β-chain is formed of 146 amino acid residues. These four chains are folded upon one another to form a tetrahedral quaternary structure.
• The quaternary structure of hemoglobin also determines its affinity for O₂.