Principle of Assay
CPD (Cyclobutane Pyrimidine Dimers) ELISA Kit (A326501) employs the competitive enzyme immunoassay technique for the quantitative measurement of CPD (Cyclobutane Pyrimidine Dimers) in serum, plasma, cell culture supernatant, cell or tissue lysate, urine, and other liquid samples. The 96-well microtiter plate has been pre-coated with CPD (Cyclobutane Pyrimidine Dimers) antigen. During the incubation, CPD (Cyclobutane Pyrimidine Dimers) present in the samples or standards competes with the fixed amount of immobilized CPD (Cyclobutane Pyrimidine Dimers) for binding sites on the Biotinylated Anti-CPD (Cyclobutane Pyrimidine Dimers) Antibody. The more CPD (Cyclobutane Pyrimidine Dimers) present in a sample or standard, the less Biotinylated Anti-CPD (Cyclobutane Pyrimidine Dimers) Antibody that binds to the plate. Following incubation, unbound Biotinylated Anti-CPD (Cyclobutane Pyrimidine Dimers) 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 CPD (Cyclobutane Pyrimidine Dimers) present in each sample or standard. The concentration of CPD (Cyclobutane Pyrimidine Dimers) can then be calculated by reading the O.D. absorbance at 450nm in a microplate reader and referring to the standard curve.