Description
Principle of the assay: Ang2R1Ab ELISA kit applies the competitive enzyme immunoassay technique utilizing Ang2R1 antigen and an Ang2R1Ab-HRP conjugate. The assay sample and buffer are incubated together with Ang2R1Ab-HRP conjugate in pre-coated plate for one hour. After the incubation period, the wells are decanted and washed five times. The wells are then incubated with a substrate for HRP enzyme. The product of the enzyme-substrate reaction forms a blue colored complex. Finally, a stop solution is added to stop the reaction, which will then turn the solution yellow. The intensity of color is measured spectrophotometrically at 450nm in a microplate reader. The intensity of the color is inversely proportional to the Ang2R1Ab concentration since Ang2R1Ab from samples and Ang2R1Ab-HRP conjugate compete for the Ang2R1 antigen binding site. Since the number of sites is limited, as more sites are occupied by Ang2R1Ab from the sample, fewer sites are left to bind Ang2R1Ab-HRP conjugate. A standard curve is plotted relating the intensity of the color (O.D.) to the concentration of standards. The Ang2R1Ab concentration in each sample is interpolated from this standard curve