The Quantikine HS Human IL-7 Immunoassay is a solid phase ELISA that specifically measures IL-7 in 18-24 hours (with an overnight incubation step). This kit is designed to measure IL-7 levels in cell culture supernates, serum, and plasma. It contains E. coli-expressed recombinant human IL-7 and antibodies raised against the recombinant factor. It has been shown to quantitate the recombinant factor accurately. Results obtained using natural IL-7 showed linear curves that were parallel to the standard curves obtained using the kit standards. These results indicate that this kit can be used to determine relative mass values for natural human IL-7. Range: 0.16 - 10 pg/mL (Cell Culture Supernates), 0.25 - 16 pg/mL (Serum, Citrate Plasma, EDTA Plasma). Sensitivity: 0.1 pg/mL. Time: 18-24 hours