title: Coexistence of substance P- and cholecystokinin-like immunoreactivity in neurons of the mesencephalic periaqueductal central gray.
mesh_terms: D000818:Animals; D002535:Cerebral Aqueduct / Q000378:metabolism*; D002766:Cholecystokinin / Q000378:metabolism*; D005455:Fluorescent Antibody Technique; D008297:Male; D008636:Mesencephalon / Q000378:metabolism*; D009474:Neurons / Q000378:metabolism; D009619:Nociceptors / Q000378:metabolism; D051381:Rats; D011919:Rats, Inbred Strains; D013373:Substance P / Q000378:metabolism*
chemical_list: D013373:Substance P; D002766:Cholecystokinin