title: What is gastrin? A progress report on the heterogeneity of gastrin in serum and tissue.
mesh_terms: D004386:Duodenum / Q000032:analysis; D005755:Gastrins / Q000032:analysis* / Q000097:blood; D006801:Humans; D007583:Jejunum / Q000032:analysis; D010437:Peptic Ulcer / Q000097:blood; D013270:Stomach / Q000032:analysis
chemical_list: D005755:Gastrins