Human IL-40 Microsample ELISA Kit is a Sandwich-based immunoassay designed for the quantitative measurement of IL-40 in serum plasma tissue homogenates cell lysates cell culture supernates and other biological fluids It provides a detection range of 0 32-20 ng/mL with a sensitivity of 0 13 ng/mL The assay can be completed in approximately 3 5h The procedure follows a 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 Human IL-40 Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Human IL-40 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 Human IL-40 biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color