The Quantikine Mouse/Rat SOST immunoassay is a 4.5 hour solid-phase ELISA designed to measure SOST in mouse or rat cell culture supernates, serum, and plasma. It contains NS0-expressed recombinant mouse SOST and antibodies raised against the recombinant factor. This immunoassay has been shown to accurately quantitate the recombinant mouse SOST. Results obtained using natural mouse or rat SOST showed dose response 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 SOST. Range: 15.60 - 1000 pg/mL. Sensitivity: 4.17 pg/mL. Time: 4.5 hours