Mucin 5AC (MUC5AC, Apomucin, Gastric Mucin, Major Airway Glycoprotein, MUC5, Mucin 5 Subtype AC Tracheobronchial, Mucin 5 Subtypes A and C, Mucin 5 Subtypes A and C Tracheobronchial/gastric, Mucin 5AC Oligomeric Mucus/gel Forming, Tracheobronchial Mucin,