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Assay Method Information |
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| | Secondary Surface Plasmon Resonance Affinity Determination |
| Description: | Approximately 20,000 Response Units (RU) of anti GST-antibody (GE Healthcare Life Sciences) were immobilized on Flow Cell (FC) 1 and FC2 of a new, freshly conditioned CM5 SensorChip (GE Healthcare Life Sciences) in a Biacore T100 instrument utilizing the immobilization wizard of the T100 software package. Approximately 1,200 RU of recombinant GST (GE Healthcare Life Sciences) was then captured on FC1 utilizing the capture wizard protocol of the T100 software package. FC1 is used as a reference subtraction point for this and all SPR assays. Approximately 2,500 RU of recombinant GST-GSK3β was then captured on FC2 utilizing the capture wizard protocol of the T100 software package. FC2 is used as the active flowcell for this and all SPR assays. The analyte plate is generated in dose response fashion in TBS buffer containing a final concentration of 2% DMSO, with a final analyte concentration of 10 μM to 10 nM with a 2× dilution factor. A zero value is determined by running injections of buffer containing only 2% DMSO and no analyte. All injections are run in duplicate and are reference subtracted from FC1. A method consisting of a 60 second contact time and 60 second wash time with a flow rate of 30 μL/min was developed. The internal standard curve for DMSO values was generated with seven injections of DMSO consisting of 1, 1.25, 1.5, 2, 2.25, 2.5 and 3% DMSO in TBS running buffer. Analysis of compounds was done using the 1:1 binding model and affinity measurements in the Biacore T100 evaluation software package. |
| Affinity data for this assay | |
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