Principle of Assay
SARS-CoV-2 Nucleoprotein (Omicron B.1.1.529) ELISA Kit (A303883) is a 4 hour sandwich Enzyme-Linked Immunosorbent Assay (sELISA) designed for the in vitro quantitative determination of coronavirus (covid-19, sars-cov-2, 2019-ncov) SARS-CoV-2 Nucleoprotein (Omicron B.1.1.529) in plasma, tissue homogenates, and other biological fluids. A 96-well microtiter plate has been pre-coated with an antibody specific for SARS-CoV-2 Nucleoprotein (Omicron B.1.1.529). Standards and samples are added to the wells, where SARS-CoV-2 Nucleoprotein (Omicron B.1.1.529) binds to the immobilized capture antibody. Following incubation, unbound components are removed by washing and a biotinylated detection antibody specific for SARS-CoV-2 Nucleoprotein (Omicron B.1.1.529) is added to the wells. The detection antibody binds the captured SARS-CoV-2 Nucleoprotein (Omicron B.1.1.529) to form an antibody-antigen-antibody sandwich complex. After further incubation and washing, HRP-Streptavidin conjugate is added to the wells. TMB substrate solution is then added to visualize the HRP enzymatic reaction. This produces a blue-coloured product that changes to yellow following addition of acidic stop solution. The intensity of the yellow colour is directly proportional to the amount of SARS-CoV-2 Nucleoprotein (Omicron B.1.1.529) captured in each well. The concentration of SARS-CoV-2 Nucleoprotein (Omicron B.1.1.529) is calculated by reading the absorbance at 450 nm and comparing the values with the standard curve.