title: Mucus, pepsin, and peptic ulcer.
mesh_terms: D005753:Gastric Mucosa / Q000378:metabolism; D006801:Humans; D009093:Mucus / Q000378:metabolism*; D010434:Pepsin A / Q000378:metabolism*; D010437:Peptic Ulcer / Q000378:metabolism*
chemical_list: D010434:Pepsin A