Nerve Growth Factor (NGF) BioAssay ELISA Kit (Rat) is a sandwich enzyme immunoassay for in vitro quantitative measurement of NGF in rat serum, plasma, tissue homogenates, cell culture supernates and other biological fluids.Detection Range:39-2,500pg/mlSensitivity:12.5pg/mlStorage and Stability:Desiccation recommended. The Standard, Detection Reagent A, Detection Reagent B and the 96-well strip plate should be stored at -20°C upon receipt. Store all other reagents at 4°C. Stable for 6 months after receipt of order.