Description
Intended Uses: This human FGF-21 ELISA kit is designed for quantification of human FGF- 21 in serum, plasma and cell culture supernate samples.
Principle of the Assay: This assay is a quantitative sandwich ELISA. The immunoplate is pre-coated with a rabbit polyclonal antibody specific for human FGF-21. Standards and samples are pipetted into the wells and any human FGF-21 present is bound by the immobilized antibody. After washing away any unbound substances, a biotin labelled polyclonal antibody specific for human FGF-21 is added to the wells. After wash step to remove any unbound reagents, streptavidin-HRP conjugate (STP-HRP) is added. After the last wash step, an HRP substrate solution is added and colour develops in proportion to the amount of human FGF-21 bound initially. The assay is stopped and the optical density of the wells determined using a microplate reader. Since the increases in absorbance are directly proportional to the amount of captured human FGF-21, the unknown sample concentration can be interpolated from a reference curve included in each assay