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Assay Method Information

Assay Name:  Radioligand Binding Assay
Description:  Radioligand binding assays were performed in CHO cells expressing human CCR2B and Galpha┬▒16 coupling protein. All compounds were dissolved in DMSO and assays run at a final DMSO concentration of 0.5% (v/v). [125I]-labeled human MCP-1 was purchased from PerkinElmer. Unlabelled human MCP-1 was purchased from PeproTech.Compounds were serially diluted in DMSO before diluting into assay buffer (25 mM HEPES, pH 7.4, 5 mM MgCl2, 1 mM CaCl2, 0.5% BSA) with cryo preserved CHO cells expressing human CCR2B and the Galpha┬▒16 coupling protein (30x103/well) and [125I]-MCP-1 (50 pM). The reaction was incubated at room temperature for 90 minutes before transferring to GF/C filter membrane (PerkinElmer) pre-treated with 0.3% polyethyleneimine for 2 hours at 4 C. The filter membrane was washed six times with ice cold wash buffer (25 mM HEPES, pH 7.4, 5 mM MgCl2, 1 mM CaCl2, 500 mM NaCl, 0.01% (m/v) azide), dried, and sealed in a RLB sample bag (Agilent Technologies).
Affinity data for this assay
 

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Last update November 1, 2007
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