Principle of Assay
Human Anti-SARS-CoV-2 Spike RBD (omicron B.1.1.529) IgA ELISA Kit (A319450) employs the indirect sandwich enzyme immunoassay technique for the quantitative measurement of human Anti-SARS-CoV-2 Spike RBD (omicron B.1.1.529) IgA in serum, plasma, tissue homogenates, and other biological fluids. A capture antibody specific for Anti-SARS-CoV-2 Spike RBD (omicron B.1.1.529) IgA is pre-coated onto the 96-well microtiter plate. Samples and standards are added, and Anti-SARS-CoV-2 Spike RBD (omicron B.1.1.529) IgA present in each sample binds to the immobilized antibody. After washing, a Biotinylated detection antibody is added and incubated. Following washing, HRP-Streptavidin is added and incubated. TMB substrate 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 proportional to the amount of Anti-SARS-CoV-2 Spike RBD (omicron B.1.1.529) IgA captured, and the concentration is calculated by reading O.D. at 450nm and referring to the standard curve.
