CFTR and cystic fibrosis: Cystic fibrosis (CF) is an autosomal recessive disorder due to mutations in the cystic fibrosis trans-membrane conductance regulator protein (CFTR) [1], [2], a cyclic AMP-regulated anion channel primarily involved in chloride and bicarbonate transport but also permeable to other larger organic anions such as glutathione (GSH) [3], [4].