Cystic fibrosis (CF) is caused by a mutation in the cystic fibrosis transmembrane conductance regulator (CFTR) protein. Thousands of CFTR mutations have been identified. but only a fraction are known to cause CF. with the most common being the prototypical class II CFTR mutation F508del. https://www.chiggate.com/majirel-majicontrast-red-rouge-for-sale/