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Markers of antioxidant status Whole blood aliquots were analyzed for superoxide dismutase (SOD), glutathione peroxidase (GPx), and catalase (CAT) activities on a microplate reader (BioTek Synergy H1, Agilent Technologies, Santa Clara, CA) via spectrophotometry using commercially available kits (Cayman Chemical Company, Ann Arbor, MI)

PMID 16371598

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Serum antibodies against the insulin-like growth factor-1 receptor (IGF-1R) in Graves disease and Graves orbitopathy

In this approach, unreacted GSH reduces Cu(II)-neocuproine to form a highly colored Cu(I)-neocuproine complex, with absorbance changes that inversely correlate with GPx activity [19]