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Hemoglobin is a vital protein responsible for oxygen transport in the blood of vertebrates. It is a complex molecule consisting of four globular protein subunits, each called a globin, and a non-protein component known as heme. The primary structure of hemoglobin involves a sequence of amino acids, forming alpha and beta chains. In adults, there are two alpha chains and two beta chains, resulting in a tetrameric structure (2α2β).

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