| Assay Method Information | |
| | Scintillation Proximity Assay |
| Description: | The CCR3 receptor binding assay was performed in a Scintillation Proximity Assay (SPA) design with the radioligand recombinant human 125Iodine-eotaxin-1. Cell membranes of hCCR3 C1 cells were again homogenized by passing through a single use needle (Terumo, 23Gx1'') and diluted in SPA incubation buffer in suitable concentrations (0.5-10 ug protein/well) in 96 well microtiter plates (1450-514, Perkin Elmer). The SPA assay was set up in the SPA incubation buffer with a final volume of 200 ul and final concentration of 25 mM HEPES, 25 mM MgCl2 6H2O, 1 mM CaCl2 2H2O and 0.1% bovine serum albumin. The SPA assay mixture contained 60 ul of the membrane suspension, 80 ul of Wheat Germ Agglutinin coated PVT beads (organic scintillator, GE Healthcare, RPNQ-0001) 0.2 mg/well), 40 ul of recombinant human 125Jodine-eotaxin-1 (Biotrend), diluted in SPA buffer to a final concentration of 30.000 dpm per well. |
| Affinity data for this assay | |
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