This Human Kallistatin (SERPINA4) ELISA Kit employs a two-site sandwich ELISA to quantitate SERPINA4 in samples. An antibody specific for SERPINA4 has been pre-coated onto a microplate. Standards and samples are pipetted into the wells and anySERPINA4 present is bound by the immobilized antibody. After removing any unbound substances, a biotin-conjugated antibody specific for SERPINA4 is added to the wells. After washing, Streptavidin conjugated Horseradish Peroxidase (HRP) is added to the wells. Following a wash to remove any unbound avidin-enzyme reagent, a substrate solution is added to the wells and color develops in proportion to the amount of SERPINA4 bound in the initial step. The color development is stopped and the intensity of the color is measured.
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