Assay Method Information | |
| RadioligandBinding Assay |
Description: | Radioligand binding assays were carried out in a volume of 200 μL (96-well plates) which contained 100 μL of cell membranes, [3H]RO7239181 at a concentration of 1.5 nM (α5β2γ1) or 20-30 nM (α1β2γ1, α2β2γ1) and the test compound in the range of [0.3-10000]=10−9 M. Nonspecific binding was defined by 10×10−6 (α5β2γ1) and 30×10−6 M RO7239181 and typically represented less than 5% (α5β2γ1) and less than 20% (β1β2γ1, α2β2γ1) of the total binding. Assays were incubated to equilibrium for 1 hour at 4° C. and then, membranes were filtered onto unifilter (96-well white microplate with bonded GF/C filters preincubated 20-50 minutes in 0.3% Polyethylenimine) with a Filtermate 196 harvester (Packard BioScience) and washed 4 times with cold Potassium Phosphate 10 mM pH 7.4, KCl 100 mM binding buffer. After anhydrousing, filter-retained radioactivity was detected by liquid scintillation counting. Ki values were calculated using Excel-Fit (Microsoft) and are the means of two determinations. |
Affinity data for this assay | |
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