Principle of Assay
This RAGE enzyme linked immunosorbent assay (ELISA) applies a technique called a quantitative sandwich immunoassay. The microtiter plate has been pre-coated with an Anti-RAGE Antibody. Standards or samples are then added to the microtire plate wells and RAGE, if present, will bind to the antibody pre-coated on the wells. In order to quantify the amount of RAGE present in the sample, Anti-RAGE Antibody (HRP) is added to each well to "sandwich" the RAGE immobilised on the plate. The microtiter plate then undergoes incubation, followed by thorough washing of the wells to remove all unbound components. Next, a TMB (3,3',5,5' tetramethyl-benzidine) substrate solution is added to each well. The enzyme (HRP) and substrate are allowed to react over a short incubation period. Only those wells that contain RAGE will exhibit a change in colour. The enzyme-substrate reaction is terminated by the addition of a stop solution and the colour change is measured spectrophotometrically at a wavelength of 450nm ± 2nm.
