Several antioxidant enzymes such as superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase, glutathione S-transferase etc. Some of those antioxidants include gutathione S-transferase, glutathione peroxidase, superoxide dismutase, and catalase. The plant meanwhile secretes esterase, peroxidase, phosphatase and protease enzymes. Enzymes used in ELISAs include horseradish peroxidase (HRP), alkaline phosphatase (AP) or glucose oxidase. PPA also causes a decrease in glutathione and Glutathione peroxidase activity. Some complexes emulate the action of various heme enzymes such as cytochrome P450, lignin peroxidase. A secondary anti-human antibody conjugated to an enzyme such as horseradish peroxidase is added. Other names include thiol specific antioxidant (TSA) and thioredoxin peroxidase (TPx). Brain polymorphonuclear leukocyte quantitation by peroxidase assay. It is a cofactor and acts on glutathione peroxidase. Detection is typically performed using peroxidase linked antibodies to catalyse a chemiluminescent reaction. There are at least four different glutathione peroxidase isozymes in animals. This gene encodes a member of the glutathione peroxidase family. Toxic or peroxidase enzyme functions have been suggested. Antibodies against thyroid peroxidase can be found on testing.