PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11238307-9 2001 CONCLUSIONS: The activity of GABA-T can be accurately determined by our procedure using 15N-labeled substrate, measuring the formation of [15N]glutamic acid. [15n]glutamic acid 138-156 4-aminobutyrate aminotransferase Homo sapiens 29-35