title: Are opioid peptides co-transmitters in noradrenergic vesicles of sympathetic nerves?
mesh_terms: D000320:Adrenergic Fibers / Q000378:metabolism*; D000818:Animals; D002417:Cattle; D002851:Chromatography, High Pressure Liquid; D004299:Dopamine beta-Hydroxylase / Q000378:metabolism; D004723:Endorphins / Q000378:metabolism*; D004745:Enkephalins / Q000378:metabolism*; D018377:Neurotransmitter Agents / Q000378:metabolism*; D009638:Norepinephrine / Q000502:physiology; D013154:Spleen / Q000294:innervation; D013572:Synaptic Vesicles / Q000378:metabolism
chemical_list: D004723:Endorphins; D004745:Enkephalins; D018377:Neurotransmitter Agents; D004299:Dopamine beta-Hydroxylase; D009638:Norepinephrine