Modifier gene may explain why some with cystic fibrosis are less prone to infection

(University of California - San Diego) People with cystic fibrosis who carry genetic variants that lower RNF5 gene expression have more mutant CFTR protein on cell surfaces. Even if the CFTR protein isn't fully functional, it's better than none, and may explain why some with cystic fibrosis are less prone to infection than others.