title: Enzyme histochemistry and hormones of the developing gastrointestinal tract of the chick embryo. V. The ultrastructural and biochemical evidence for the presence of an insulin like substance, enteroglucagon and serotonin in the developing chick duodenum.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D004386:Duodenum / Q000032:analysis / Q000166:cytology / Q000196:embryology*; D005865:Gestational Age; D005934:Glucagon / Q000032:analysis; D006651:Histocytochemistry; D007328:Insulin / Q000032:analysis; D008854:Microscopy, Electron; D012701:Serotonin / Q000032:analysis
chemical_list: D007328:Insulin; D012701:Serotonin; D005934:Glucagon