For quantitative determination of glutathione reductase activity.

• Linear detection range 0.4 to 50 U/L for 20 min reaction
• Homogeneous "mix-incubate-measure" type assay
• Can be readily automated to process thousands of samples per day

Glutathione reductase (GR) reduces oxidized glutathione (GSSG) to the reduced sulfhydryl form GSH which is an important cellular antioxidant

BioAssay Systems’ non-radioactive, colorimetric GR assay is designed to accurately measure GR activity in biological samples with a method that utilizes Ellman’s method in which DTNB reacts with the GSH generated from the reduction of GSSG by the GR in a sample to form a yellow product (TNB2-). The rate of change in the optical density, measured at 412 nm, is directly proportional to GR activity in the sample.

A high GSH/GSSG ratio is important for protection against oxidative stress. Thus, measurement of GR activity is used as indicator for oxidative stress.