Keratin 13 is a protein that in humans is encoded by the KRT13 gene. Keratin 13 is a type I cytokeratin, it is paired with keratin 4 and found in the suprabasal layers of non-cornified stratified epithelia. 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.