Renin (EC 3.4.23.15), also known as an angiotensinogenase, is an enzyme that participates in the renin-angiotensin system (RAS) which mediates extracellular volume (i.e. blood plasma, lymph and interstitial fluid), and arterial vasoconstriction. An over-active renin-angiotensin system leads to vasoconstriction and retention of sodium and water, causing hypertension. Renin inhibitors are widely used for the treatment of hypertension. Intended Use:Reliable test for screening, studying, and characterizing potential inhibitors of rat renin.Test Principle:This Rat Renin Inhibitor Screening BioAssay Kit uses a synthetic peptide substrate with a fluorophore (EDANS) at one end and a quencher (DABCYL) at the other end. Renin catalyzes the cleavage of FRET substrate resulting in a product that is detected fluorometrically at Ex/Em = 328/552nm. In the presence of a rat Renin inhibitor, the rate of hydrolysis of the substrate is decreased or inhibited. The kit provides a rapid, simple, sensitive, and reliable test suitable for high-throughput screening of rat renin inhibitors. It is also adaptable to a 384-well format.Kit Components:Renin Assay Buffer, 1x25ml Rat Renin Substrate, 1x200ul Rat Renin Enzyme, lyophilized, 1x vial Rat Renin Inhibitor, lyophilized, 1x vial Storage and Stability:Store powder at 4°C liquid at -20°C. Store other components at 4°C. Stable for at least 6 months For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.