The CFTR (Cystic Fibrosis Transmembrane Conductance Regulator) is a unique ABC protein functioning as a chloride channel. It consists of two transmembrane and two nucleotide binding domains, and a regulatory region. The cftr gene is mutated in cystic fibrosis, an inherited disease of high morbidity and mortality mostly affecting people with European ancestors. So far more than 1,500 mutations are ...