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The cystic fibrosis transmembrane conductance regulator, or CFTR, gene is directly related to a protein by the same name. Our bodies make protein from things like carbon, hydrogen and nitrogen. The CFTR gene tells the body how to make CFTR protein. This CFTR protein hangs out on the surface of cells that line our lungs, digestive system and skin. If it has broken parts, or mutations, chloride (salt) can’t pass through normally, and the result is thick and sticky mucus in our lungs and digestive system.
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