title: Radioimmunoassay systems for enkephalins.
mesh_terms: D000818:Animals; D001923:Brain Chemistry; D004723:Endorphins / Q000032:analysis*; D004745:Enkephalins / Q000032:analysis*; D011817:Rabbits; D011863:Radioimmunoassay
chemical_list: D004723:Endorphins; D004745:Enkephalins