CHEMBL3706075

Inhibition Assay: The inhibitor solution is prepared by dissolving 3-5 mg of inhibitor in pH 2 solution (0.01 N HCl), such that the concentration of the solution is equal to 1 mg/10 mL. A 10 μL sample of this solution is then added to 990 μL of pH 8 buffer (0.1 M HEPES, 0.14 M NaCl), and the solution is allowed to stand at room temperature overnight.The enzyme solution is prepared by diluting 20 μL of DPIV (concentration 2.5 nM) into 40 mL of pH 8 buffer.The substrate solution is prepared by dissolving 2.0 mg of L-alanyl-L-proline-para-nitroanilide into 20 mL of pH 8 buffer.250 μL of enzyme solution is added to well #B1 to #H1, #A2 to #H2, and #A3 to #H3 of a 96 well plate, while well #A1 receives 250 μL of pH 8 buffer instead of enzyme solution. 904 of pH 8 buffer is then added to column 5 (from well #A5 to #H5).