KE00331 is a solid phase sandwich Enzyme Linked-Immuno-Sorbent Assay (Sandwich ELISA). The human PDGFR beta ELISA kit is to be used to detect and quantify protein levels of endogenous human PDGFR beta. The assay recognizes human PDGFR beta. An antibody specific for human PDGFR beta has been pre-coated onto the microwells. The human PDGFR beta protein in samples is captured by the coated antibody after incubation. Following extensive washing, another horseradish peroxidase (HRP)-conjugated antibody specific for human PDGFR beta is added to detect the captured human PDGFR beta protein. For signal development, followed by Tetramethyl-benzidine (TMB) reagent. Solution containing sulfuric acid is used to stop color development and the color intensity which is proportional to the quantity of bound protein is measurable at 450 nm with the correction wavelength set at 630 nm.