ACTB and cystic fibrosis: Other gene products operating during the inflammatory process include the Egfbp2, part of the kallikrein gene family [73], the actin binding protein (Actb), the mentioned above Muc1 that is part of signalling proteins regulating cell adhesion/de-adhesion [74] and two genes coding for metallothionein, Mt1 and Mt2. Increased levels of Muc1 have been found in the small intestine of a cystic fibrosis mouse model [75].