The Ansh Labs' PAPP-A / Stanniocalcin-2 Complex enzyme linked immunosorbent assay (ELISA) is a quantitative three-step sandwich immunoassay for the quantitative measurement of PAPP-A Stanniocalcin-2 Complex in human serum and other biological fluids. The antibody pair used is specific to the complex and does not recognize either Stanniocalcin 2 or PAPP-A individually. Dynamic range of 0.26-23.37 ng/mL. Sensitive to 0.014 ng/mL. Total 3.5 hour incubations. Long shelf life of 24 months. Research Use Only within the United States. Ansh Labs is an FDA registered manufacturer of diagnostic test kits, antibodies, antigens, and proteins.