The Quantikine Mouse IL-1ra Immunoassay is a 4.5 hour solid-phase ELISA designed to measure mouse IL-1ra in cell culture supernates, serum, and plasma. It contains E. coli-expressed recombinant mouse IL-1ra and antibodies raised against the recombinant factor. This immunoassay has been shown to accurately quantitate the recombinant factor. Results obtained using natural mouse IL-1ra 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 naturally occurring mouse IL-1ra. Range: 31.20 - 2000 pg/mL. Sensitivity: 13 pg/mL. Time: 4.5 hours