Principle of Assay
Rabbit TSH ELISA Kit (A246966) employs the competitive enzyme immunoassay technique for the quantitative measurement of rabbit TSH in serum, plasma, tissue homogenates, and other biological fluids. The 96-well microtiter plate has been pre-coated with TSH antigen. During the incubation, TSH present in the samples or standards competes with the fixed amount of immobilized TSH for binding sites on the Biotinylated Anti-TSH Antibody. The more TSH present in a sample or standard, the less Biotinylated Anti-TSH Antibody that binds to the plate. Following incubation, unbound Biotinylated Anti-TSH 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 TSH present in each sample or standard. The concentration of TSH can then be calculated by reading the O.D. absorbance at 450nm in a microplate reader and referring to the standard curve.
