This assay employs the competitive inhibition enzyme immunoassay technique. The microtiter plate provided in this kit has been pre-coated with goat-anti-rabbit antibody. Standards or samples are added to the appropriate microtiter plate wells with an antibody specific for SOD and Horseradish Peroxidase (HRP) conjugated SOD. The competitive inhibition reaction is launched between with HRP labeled SOD and unlabeled SOD with the antibody. A substrate solution is added to the wells and the color dev