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Assay Method Information

Assay Name:  Measurement of Human SPR Inhibitory Activity Assay
Description:  Human SPR inhibitory activity was measured by using a 384-well low adsorption clear plate (Greiner) with buffer D containing 100 mM Tris-HCl (pH 7.5) (Thermo Fisher Scientific) and 0.01% bovine serum albumin (Sigma). A compound was diluted with DMSO to a concentration of 1 mM, and a 1 μL aliquot of the preparation was diluted with 250 μL of buffer D. The thus-diluted compound was dispensed into the 384-well plate at L/well. Thereafter, human SPR was diluted with buffer D to 200 ng/mL and then dispensed into the 384-well plate at 20 μL/well. Subsequently, 40 μL of ultrapure water containing 120 μM Sepiapterin (WuXi AppTec) and 120 μM NADPH (Nacalai) was added to each well, and mixed with a vortex mixer, to thereby initiate the reaction. The reaction mixture was incubated at room temperature for 240 minutes, and the reaction was terminated by addition of 10 μL of ultrapure water containing 2% formic acid (Nacalai). In order to determine the amount of sepiapterin after termination of the reaction, the absorbance at 420 nm was measured by applying the 384-well plate to EnSpire multimode plate reader (Perkin Elmer).
Affinity data for this assay
 

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Last update November 1, 2007
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