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4-Aminobutyric acid / GABA is a transmitter of enteric interneurons, targeting excitatory GABA A or inhibitory GABA B receptors that modulate motility and mucosal function.
Enteric 4-Aminobutyric acid / GABAergic neurons appear to be exclusively interneurons that release 4-Aminobutyric acid / GABA as an excitatory neurotransmitter, as opposed to its inhibitory role in the CNS.