Principle of Assay
Bovine SRY/TDF ELISA Kit (A326901) employs the competitive enzyme immunoassay technique for the quantitative measurement of bovine SRY/TDF in serum, plasma, cell culture supernatant, cell or tissue lysate, and other liquid samples. The 96-well microtiter plate has been pre-coated with SRY/TDF antigen. During the incubation, SRY/TDF present in the samples or standards competes with the fixed amount of immobilized SRY/TDF for binding sites on the Biotinylated Anti-SRY/TDF Antibody. The more SRY/TDF present in a sample or standard, the less Biotinylated Anti-SRY/TDF Antibody that binds to the plate. Following incubation, unbound Biotinylated Anti-SRY/TDF Antibody is removed by washing, and an HRP-Streptavidin conjugate is added to the wells and the microtiter plate is incubated. Following incubation and washing, TMB substrate solution is then used to visualize the HRP enzymatic reaction by catalysis to produce a blue-coloured product that changes to yellow after addition of acidic stop solution. The density of yellow is inversely proportional to the amount of SRY/TDF present in each sample or standard. The concentration of SRY/TDF can then be calculated by reading the O.D. absorbance at 450nm in a microplate reader and referring to the standard curve.