The Quantikine Mouse/Rat GDF-15 Immunoassay is a 4.5 hour solid-phase ELISA designed to measure mouse and rat GDF-15 in cell culture supernates, serum, plasma, and urine. It contains E. coli-expressed recombinant mouse GDF-15 and antibodies raised against the recombinant factor. This immunoassay has been shown to accurately quantitate the recombinant factor. Results obtained using natural mouse or rat GDF-15 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 and rat GDF-15. Range: 7.80 - 500 pg/mL. Sensitivity: 2.2 pg/mL. Time: 4.5 hours