to determine the mode ( s ) of action of this multifunctional compound , other reducing agents ( l-cysteine , dithiothreitol ) , cysteine delivery agents ( n-acetyl-l-cysteine , l-thiazolidine-4-carboxylic acid , l-2-oxothiazolidine-4-carboxylic acid ) , cysteine analogues ( s-methyl-l-cysteine , d-glucose-l-cysteine , cysteine ethyl ester ) , free-component amino acids of gsh ( glutamic acid , cysteine , and glycine ) , a specific metabolic inhibitor of gamma-glutamyl synthetase ( buthionine sulfoximine ) , and an inhibitor of gamma-glutamyl transpeptidase ( gamma-glutamyl glutamic acid ) were also tested at concentrations of 0.01-50 mm in this system .
C0002520
amino acids
C0061472
glutamic acid