Description
Intended Uses: This Abeta1-42 ELISA kit is intended Laboratory for research use only and is not for use in diagnostic or therapeutic procedures.The Stop Solution changes the color from blue to yellow and the intensity of the color is measured at 450 nm using a spectrophotometer. In order to measure the concentration of Abeta1-42 in the sample, this Abeta1-42 ELISA Kit includes a set of calibration standards. The calibration standards are assayed at the same time as the samples and allow the operator to produce a standard curve of Optical Density versus Abeta1-42 concentration. The concentration ofAbeta1-42 in the samples is then determined by comparing the O.D. of the samples to the standard curve.
Principle of the Assay: This Abeta1-42 enzyme linked immunosorbent assay applies a technique called a quantitative sandwich immunoassay. The microtiter plate provided in this kit has been pre-coated with a monoclonal antibody specific for Abeta1-42. Standards or samples are then added to the microtiter plate wells and Abeta1-42 if present, will bind to the antibody pre-coated wells. In order to quantitatively determine the amount of Abeta1-42 present in the sample, a standardized preparation of horseradish peroxidase (HRP)-conjugated polyclonal antibody, specific for Abeta1-42 are added to each well to "sandwich" the Abeta1-42 immobilized on the plate. The microtiter plate undergoes incubation, and then the wells are thoroughly washed to remove all unbound components. Next, A and B substrate solution is added to each well. The enzyme (HRP) and substrate are allowed to react over a short incubation period.Only those wells that contain Abeta1-42 and enzyme-conjugated antibody will exhibit a change in colour. The enzyme-substrate reaction is terminated by the addition of a sulphuric acid solution and the colour change is measured spectrophotometrically at a wavelength of 450 nm