Description
The test principle applied in this kit is Sandwich enzyme immunoassay. The microtiter plate provided in this kit has been pre-coated with an antibody specific to Indoleamine-2,3-Dioxygenase 2 (IDO2). Standards or samples are then added to the appropriate microtiter plate wells with a biotin-conjugated antibody specific to Indoleamine-2,3-Dioxygenase 2 (IDO2). Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is added, only those wells that contain Indoleamine-2,3-Dioxygenase 2 (IDO2), biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450nm ± 10nm. The concentration of Indoleamine-2,3-Dioxygenase 2 (IDO2) in the samples is then determined by comparing the O.D. of the samples to the standard curve