blood glutathione peroxidase activity level plasma glutathione peroxidase activity level 2014-06-05T12:49:19Z CMO:0002443 JSmith The amount of ezymatic activity of glutathione peroxidase in a specified sample of plasma, the fibrinogen-containing fluid portion of the blood in which the particulate components are suspended. Glutathione peroxidase (GPx) is an enzyme that catalyzes the reaction of two glutathiones with H2O2, forming glutathione disulfide and two water molecules, and is a crucial enzyme in hydrogen peroxide detoxification. clinical_measurement_ontology plasma GPx activity level plasma GSH-Px activity level