The Ansh Labs' PAPP-A ELISA kit is a quantitative two-step sandwich immunoassay. The Ansh Labs PAPP-A kit detects the heterotetrameric form and homidimeric format of PAPP-A equimolarly thus it is a reliable measurement in studies of both pregnant and non-pregnant subjects. Wide dynamic range of 40 - 7500 ng/mL allows for studies in a variety of physiological states. Sensitive to 10 ng/mL. Total 3 hour incubation at room temperature. Long shelf life of 24 months. For Research Use Only within the United States. CE Mark kit available for international purchases. Ansh Labs, located just south of Houston Texas, is an FDA registered manufacturer of diagnostic test kits, antibodies, antigens, and proteins.