Principle of the Assay: KLB ELISA kit applies the competitive enzyme immunoassay technique utilizing a polyclonal anti-KLB antibody and an KLB-HRP conjugate. The assay sample and buffer are incubated together with KLB-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 KLB concentration since KLB from samples and KLB-HRP conjugate compete for the anti-KLB antibody binding site. Since the number of sites is limited, as more sites are occupied by KLB from the sample, fewer sites are left to bind KLB-HRP conjugate. A standard curve is plotted relating the intensity of the color (O.D.) to the concentration of standards. The KLB concentration in each sample is interpolated from this standard curve.
NCBI and Uniprot Product Information
Uniprot Description
Klotho beta: Contributes to the transcriptional repression of cholesterol 7-alpha-hydroxylase (CYP7A1), the rate-limiting enzyme in bile acid synthesis. Probably inactive as a glycosidase. Increases the ability of FGFR1 and FGFR4 to bind FGF21. Belongs to the glycosyl hydrolase 1 family. Klotho subfamily.
Protein type: Membrane protein, integral
Cellular Component: membrane; integral to membrane; plasma membrane
Molecular Function: fibroblast growth factor binding; fibroblast growth factor receptor binding; hydrolase activity, hydrolyzing O-glycosyl compounds
Biological Process: fibroblast growth factor receptor signaling pathway; carbohydrate metabolic process; positive regulation of cell proliferation