Human Von Hippel Lindau / VHL ELISA Kit (A310626) employs the sandwich enzyme immunoassay technique for the quantitative measurement of human Von Hippel Lindau / VHL in An antibody specific for Von Hippel Lindau / VHL has been pre-coated onto a 96-well microtiter plate. The standards and test samples are added into the wells and the Von Hippel Lindau / VHL present in each sample is bound to the wells by the immobilized antibody. Biotinylated Anti-Von Hippel Lindau / VHL Antibody, which also binds the Von Hippel Lindau / VHL present in each sample, and Streptavidin-HRP, which binds the Biotinylated Anti-Von Hippel Lindau / VHL Antibody, are added and the microtiter plate is incubated. Following incubation, unbound Biotinylated Anti-Von Hippel Lindau / VHL Antibody and unbound Streptavidin-HRP are removed by washing, and two substrate solutions are added to the wells. Color develops in proportion to the amount of Von Hippel Lindau / VHL captured in each well. The color development is stopped by addition of stop solution which changes the color from blue to yellow and the intensity of the color is then measured. The concentration of Von Hippel Lindau / VHL in the samples can then be calculated by reading the O.D. absorbance at 450nm in a microplate reader and referring to the standard curve.