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Assay Method Information

Assay Name:  Inhibition Assay
Description:  0.35 μg/mL human FXIa was allowed to react with a substrate and a test compound in a 30 mmol/L HEPES buffer solution (pH 7.4) that contained 145 mmol/L NaCl, 5 mmol/L KCl, and 1 mg/mL PEG8000 (manufactured by QIAGEN) at 37 C. for 10 minutes. To the substrate, S-2366 (pyroGlu-Pro-Arg-pNA.HCl) was added to a final concentration of 300 μmol/L. After the reaction had progressed, the absorbance at OD 405 nm was measured. A change in OD without addition of the test compound was set at 100%, and a concentration at which an increase in the OD value is suppressed by 50% was calculated as an IC50 value (nmol/L).
Affinity data for this assay
 

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Last update November 1, 2007
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