Keratin 5, also known as KRT5, K5, or CK5, is a protein that is encoded in humans by the KRT5 gene. It dimerizes with keratin 14 and forms the intermediate filaments that make up the cytoskeleton of basal epithelial cells. From Wikipedia
Scientists confirm Krt5-expressing basal cells in the trachea as the origin of lung squamous cell carcinoma, opening possibilities for early detection and prevention.