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Assay Method Information

Assay Name:  STING SPR Binding Assay
Description:  Compounds were analyzed on an S200 biacore SPR instrument (GE Healthcare). E. coli produced truncated STING protein was immobilized on a series S streptavidin chip via biotin capture (GE Healthcare #BR100531) with. Compounds were screened at 1:2 dilutions from 100 uM to 0.195 uM in run buffer (10 mM HEPES, pH 7.4, 150 mM NaCl, 0.005% P20, 1 mM TECEP). Steady state affinity and kinetic evaluations were carried out using 1:1 binding model (STING was treated as a dimer). Run parameters were as follows: 60 sec on, 300 sec off for the IFM compounds, cyclic-di-GMP (60 sec on/60 sec off), thiol isomer 1 (60 sec on/300 sec off) and cGAMP (60 sec on/1200 sec off) with a flow rate of 50 μL/min and data collection at 40 Hz at 25 C.
Affinity data for this assay
 

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Last update November 1, 2007
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