The BioAssay ELISA Kit is a 1.5-hour solid-phase competitive ELISA designed for the quantitative determination of KL in rat serum, plasma, cell culture supernatants, tissue homogenates and other body fluids. This kit is intended for research use only and may not be used for therapeutic or diagnostic applications.Detection Range:100-2500pg/mlSensitivity:1.0pg/mlPrecision:Intra-Assay %CV: <10%Inter-Assay %CV: <10%Specificity:This assay has high sensitivity and excellent specificity for detection of KL (rat). No significant crossreactivity or interference with analogs was observed.Note: Crossreactivity detection between KL and all analogs has not been determined and crossreaction may exist in some cases.Assay Principle:Klotho (KL) BioAssay ELISA Kit (Rat) employs the quantitative competitive enzyme-linked immunoassay technique, utilizing a microtiter plate that has been pre-coated with a monoclonal anti-KL antibody. The assay samples and standards are incubated together with KL-HRP conjugate for one hour. A competition for limited antibody binding sites on the plate occurs between KL-HRP conjugate and KL in the samples and standards. 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 terminate 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 KL concentration in the sample or standard. A standard curve is plotted relating the intensity of the color (O.D.) to the concentrations of the standards. The KL concentration in each sample is interpolated from this standard curve.Kit Components:195659A: Microtiter Strips, 1x48 wells or 1x96 wells195659B: Enzyme Conjugate, 1x3ml or 1x6ml 195659C: Standard, 0pg/ml, 1x1vial195659D: Standard, 100pg/ml, 1x1vial195659E: Standard, 250pg/ml, 1x1vial195659F: Standard, 500pg/ml, 1x1vial195659G: Standard, 1000pg/ml, 1x1vial195659H: Standard, 2500pg/ml, 1x1vial195659J: Substrate A, 1x6ml195659K: Substrate B, 1x6ml195659L: Stop Solution, 1x6ml195659M: Wash Solution, 100X, 1x10ml195659N: Balance Solution, 1x6mlNote: The BALANCE SOLUTION is used only when the sample is cell culture supernatants, body fluid and tissue homogenate; if the sample is serum or plasma, then the BALANCE SOLUTION is a superfluous reagent.Storage and Stability:Store components at 4°C. Stable for 6 months after receipt. For maximum recovery of product, centrifuge the original vial prior to removing the cap. Contact:United States Biological4 Technology WaySalem, MA 01970www.usbio.netTech Support: tech@usbio.netCustomer Service: service@usbio.netTel: 781-639-5092 • 800-520-3011Fax: 978-594-8052