. "\"The regulated release of neurotransmitter into the synaptic cleft. A neurotransmitter is 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. Among the many substances that have the properties of a neurotransmitter are acetylcholine, noradrenaline, adrenaline, dopamine, glycine, gamma-aminobutyrate, glutamic acid, substance P, enkephalins, endorphins and serotonin.\" [CHEBI:25512, GOC:dph]" . . "neurotransmitter secretion" . "neurotransmitter release" . "Reactome:REACT_100716 \"Neurotransmitter Release Cycle, Bos taurus\"" . "Reactome:REACT_102134 \"Neurotransmitter Release Cycle, Arabidopsis thaliana\"" . "Reactome:REACT_102586 \"Neurotransmitter Release Cycle, Xenopus tropicalis\"" . "Reactome:REACT_102743 \"Neurotransmitter Release Cycle, Rattus norvegicus\"" . "Reactome:REACT_105010 \"Neurotransmitter Release Cycle, Oryza sativa\"" . "Reactome:REACT_105885 \"Neurotransmitter Release Cycle, Taeniopygia guttata\"" . "Reactome:REACT_110862 \"Neurotransmitter Release Cycle, Sus scrofa\"" . "Reactome:REACT_11184 \"Botulinum neurotoxicity, Homo sapiens\"" . "Reactome:REACT_113329 \"Neurotransmitter Release Cycle, Staphylococcus aureus N315\"" . "Reactome:REACT_115061 \"Neurotransmitter Release Cycle, Dictyostelium discoideum\"" . "Reactome:REACT_13723 \"Neurotransmitter Release Cycle, Homo sapiens\"" . "Reactome:REACT_29477 \"Neurotransmitter Release Cycle, Danio rerio\"" . "Reactome:REACT_29495 \"Neurotransmitter Release Cycle, Drosophila melanogaster\"" . "Reactome:REACT_29928 \"Neurotransmitter Release Cycle, Mus musculus\"" . "Reactome:REACT_77375 \"Neurotransmitter Release Cycle, Mycobacterium tuberculosis\"" . "Reactome:REACT_85993 \"Neurotransmitter Release Cycle, Canis familiaris\"" . "Reactome:REACT_91316 \"Neurotransmitter Release Cycle, Caenorhabditis elegans\"" . "Reactome:REACT_95406 \"Neurotransmitter Release Cycle, Gallus gallus\"" . "Reactome:REACT_99398 \"Neurotransmitter Release Cycle, Escherichia coli\"" . . . . .