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| | A2a Ki assay |
| Description: | Binding affinities of compounds of the invention for the human A2a receptor were determined in a competition binding assay using Scintillation Proximity technology. Thus, 1* μg, or preferably 0.25 μg of membranes from HEK293 cells expressing the human A2a receptor were incubated with a compound of the invention at concentrations ranging from 3000 nM to 0.15 nM in a reaction mixture containing also 0.5 nM of a tritiated form of 5-amino-7-[2-phenethyl]-2-(furan-2-yl)-7H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine (the tritiated compound) and 25 μg of wheat germ agglutin-coated yttrium silicate SPA beads for one hour at room temperature with agitation. The beads were then allowed to settle to the bottom of the wells for 1 hr, after which the membrane-associated radioactivity was determined by scintillation counting in a TopCount microplate reader. Ki values were determined using the Cheng-Prusoff equation. |
| Affinity data for this assay | |
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