title: Co-occurrence of substance P-like and Leu-enkephalin-like immunoreactivities in neurones and fibres of avian nervous system.
mesh_terms: D000818:Animals; D001717:Birds / Q000033:anatomy & histology / Q000502:physiology*; D001921:Brain / Q000378:metabolism*; D001931:Brain Mapping; D004723:Endorphins / Q000378:metabolism*; D004743:Enkephalin, Leucine; D004745:Enkephalins / Q000378:metabolism*; D007158:Immunologic Techniques; D013373:Substance P / Q000378:metabolism*
chemical_list: D004723:Endorphins; D004745:Enkephalins; D013373:Substance P; D004743:Enkephalin, Leucine