The Quantikine Mouse ST2/IL-33 R Immunoassay is a 4.5 hour solid phase ELISA designed to measure mouse ST2 in cell culture supernates, serum, and plasma. It contains Sf 21-expressed recombinant mouse ST2 and antibodies raised against the recombinant factor. This immunoassay has been shown to quantitate the recombinant factor accurately. Results obtained using natural mouse ST2 showed dose-response curves that were parallel to the standard curves obtained using the recombinant kit standards. These results indicate that this kit can be used to determine relative mass values for natural mouse ST2. Range: 0.16 - 10 ng/mL. Sensitivity: 0.059 ng/mL. Time: 4.5 hours