DNA contains the "blueprint" for haemoglobin (the material that makes up genes). An individual typically has four genes that produce the alpha protein, also known as the alpha chain. The beta chain is encoded by two additional genes.

<h3>Describe the mechanism.</h3>

The beta-globin protein is made using instructions from the HBB gene. Red blood cells include a bigger protein called haemoglobin, of which beta-globin is a part (or subunit). Hemoglobin in adults typically has four protein components: two subunits of beta-globin and two subunits of an alpha-globin protein, which is created by the HBA gene. Each of these protein subunits is joined (bound) to a heme, a molecule with iron in its centre that can bind to one or more iron-containing molecules.molecule of oxygen Red blood cells' haemoglobin attaches to oxygen molecules in the lungs. These cells subsequently circulate through the bloodstream, supplying tissues all over the body with oxygen.

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