the localization of three different putative neurotransmitters -- indoleamine , catecholamine , and substance p -- was studied in the paratrigeminal nucleus of the rat and rhesus monkey at the light and electron microscope level by autoradiography following administration of [ 3h ] 5-hydroxytryptamine , or [ 3h ] norepinephrine , and by immunocytochemistry using the unlabelled anti-substance p antiserum peroxidase -- antiperoxidase technique .
C0007412
catecholamine
C0028351
norepinephrine