The Quantikine Human IL-18 BPa Immunoassay is a 4.5 hour solid phase ELISA designed to measure IL-18 BPa in cell culture supernates, cell lysates, serum, and plasma. It contains NS0-expressed recombinant human IL-18 BPa and antibodies raised against the recombinant factor. This immunoassay has been shown to accurately quantitate recombinant human IL-18 BPa. Results obtained using natural human IL-18 BPa 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 IL-18 BPa. Range: 26.60 - 1700 pg/mL. Sensitivity: 7.52 pg/mL. Time: 4.5 hours