It is also abbreviated as “hgb”. Hemoglobin is the protein present in your red blood cells that carries oxygen from the lungs to the body tissues and returns carbon dioxide from the tissues to the lungs.

Like all proteins, hemoglobin is also made of amino acids but with polypeptide chains in which two alpha chains of 141 amino acid residues each and two beta chains of 146 amino acid residues each.

Hemoglobin carries oxygen to the cells. Hemoglobin is contained in red blood cells.

glutamic acid is replaced by valine in the beta chain

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Amino acids