title: Immunohistochemical and ultrastructural studies on the endocrine polypeptide (APUD) cells of the avian gastrointestinal tract.
mesh_terms: D000818:Animals; D002645:Chickens / Q000033:anatomy & histology*; D004064:Digestive System / Q000032:analysis / Q000166:cytology*; D005455:Fluorescent Antibody Technique; D005768:Gastrointestinal Hormones / Q000032:analysis*; D006651:Histocytochemistry; D007120:Immunochemistry; D008856:Microscopy, Fluorescence; D010455:Peptides / Q000032:analysis*; D011784:Quail / Q000033:anatomy & histology*
chemical_list: D005768:Gastrointestinal Hormones; D010455:Peptides