Source:http://linkedlifedata.com/resource/umls/id/C0597063
GO: The chemical reactions and pathways involving neurotransmitters, any of a group of substances that are released on excitation from the axon terminal of a presynaptic neuron of the central or peripheral nervous system and travel across the synaptic cleft to either excite or inhibit the target cell. [CHEBI:25512, GOC:jl],CSP: sum of chemical changes that occur within the tissues of an organism consisting of anabolism (biosynthesis) and catabolism of neurotransmitters; the buildup and breakdown of neurotransmitters for utilization by the organism.