41. This gene product belongs to the glutathione peroxidase family, which functions in the detoxification of hydrogen peroxide. 42. The antibody can either be conjugated to a fluorophore or to horseradish peroxidase for imaging and / or quantification. 43. Enzymes used in ELISAs include horseradish peroxidase ( HRP ), alkaline phosphatase ( AP ) or glucose oxidase. 44. The best studied cellular antioxidants are the enzymes superoxide dismutase ( SOD ), catalase, and glutathione peroxidase . 45. One study has suggested that glutathione peroxidase and superoxide dismutase polymorphisms play a role in the development of celiac disease. 46. Other microbial enzymes may be involved in lignin biodegradation, such as manganese peroxidase and the copper-based laccase. 47. The mechanism by which lignin peroxidase ( Lip ) interacts with the lignin polymer involves Veratryl alcohol ( Valc ). 48. Due to this critical disparity, much speculation has surrounded the function of the DUOX peroxidase domain ( s ). 49. For example, although eosinophil peroxidase is " able " to oxidize chloride, it preferentially oxidizes bromide. 50. It reduces glutathione via glutathione reductase, which converts reactive H 2 O 2 into H 2 O by glutathione peroxidase .