Rosalki S B, Nemesánszky E, Foo A Y
Ann Clin Biochem. 1981 Jan;18(Pt 1):25-7. doi: 10.1177/000456328101800106.
A new fluorescence method for demonstrating gamma-glutamyltransferase isoenzymes using gamma-glutamyl-5-amino-4-methyl coumarin, a commercially available, non-carcinogenic substrate is described. The procedure can readily detect gamma-glutamyltransferase isoenzymes in samples with total activity as low as 5 U/l at 30 degrees C.