单语范例（未经PONS编辑处理）
For example, there are over 1000 known mutant alleles of the CFTR gene that cause cystic fibrosis.
en.wikipedia.org In addition, this protein regulates alternate splicing of the CFTR gene.
en.wikipedia.org Ideally, gene therapy places a normal copy of the CFTR gene into affected cells.
en.wikipedia.org They started at the crime scene by genetically testing patients with pancreatitis and tracing the process, step by step, to the prime suspect -- that same CFTR gene.
www.post-gazette.com Human mutations in the CFTR gene might be selected for as a way to survive cholera.
en.wikipedia.org