title: The role of the zone of polarizing activity in controlling the differentiation of the apical mesenchyme of the chick wing-bud: histochemical techniques in the analysis of a developmental problem.
mesh_terms: D000135:Acid Phosphatase / Q000032:analysis; D000818:Animals; D001842:Bone and Bones / Q000166:cytology / Q000196:embryology*; D002454:Cell Differentiation; D002470:Cell Survival; D002642:Chick Embryo; D002678:Chimera; D004247:DNA / Q000032:analysis; D006651:Histocytochemistry; D011784:Quail / Q000196:embryology; D014921:Wings, Animal / Q000196:embryology*
chemical_list: D004247:DNA; D000135:Acid Phosphatase