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Assay Method Information

Assay Name:  Inhibition Assay
Description:  Human factor D (purified from human serum, Complement Technology, Inc.) at 80 nM final concentration is incubated with test compound at various concentrations for 5 minutes at room temperature in 50 mM Tris, 1M NaCl, pH 7.5. A synthetic substrate Z-L-Lys-SBzl and DTNB (Ellman's reagent) are added to final concentrations of 100 μM each. The increase in color is recorded at OD405 nm in a microplate in kinetic mode over 30 minutes with 30 second time points in a spectrofluorimeter. IC50 values are calculated by non-linear regression from the percentage of inhibition of complement factor D activity as a function of test compound concentration.
Affinity data for this assay
 

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Last update November 1, 2007
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