the method is based on the colorimetric measurement of reduced glutathione ( gsh ) ( 1 ) produced when the enzyme is incubated with oxidised glutathione ( gssg ) in the presence of either reduced nicotinamide adenine dinucleotide ( nadh ) or reduced nicotinamide adenine dinucleotide phosphate ( nadph ) .
C0017817
gsh
C0061516
gssg