Source:http://linkedlifedata.com/resource/umls/id/C1148668
GO: Combining with gamma-aminobutyric acid (GABA), and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity. (GABA, 4-aminobutyrate) is an amino acid which acts as a neurotransmitter in some organisms. [GOC:jl, GOC:signaling, PMID:10637650]