The Quantikine Human PDGF-BB Immunoassay is a 4.5 hour solid-phase ELISA designed to measure human PDGF-BB in cell culture supernates, serum, or plasma. It contains E. coli-expressed recombinant human PDGF-BB and has been shown to accurately quantitate the recombinant factor. Results obtained using natural human PDGF-BB showed linear curves that were parallel to the standard curves obtained using the Quantikine kit standards. These results indicate that this kit can be used to determine relative mass values for natural human PDGF-BB. Range: 31.20 - 2000 pg/mL. Sensitivity: 15 pg/mL. Time: 4.5 hours