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| | Radioligand Binding Assay |
| Description: | Radioligand binding assays (screening and dose-displacement) used 0.1nM [3H]-nociceptin (NEN; 87.7 Cl/nimole) with 10-20 ug membrane protein in a final volume of 500uL binding buffer (10mM MgCl2, 1mM EDTA, 5% DMSO, 50mM HEPES, pH 7.4). Non-specific binding was determined in the presence of 10nM unlabeled nociceptin (American Peptide Company). All reactions were performed in 96-deep well polypropylene plates for 1 h at about 25C. Binding reactions were terminated by rapid filtration onto 96-well Unifilter GF/C filter plates (Packard) presoaked in 0.5% polyethylenimine (Sigma). Harvesting was performed using a 96-well tissue harvester (Packard) followed by three filtration washes with 500uL ice-cold binding buffer. Filter plates were subsequently dried at 50C for 2-3 hours. Fifty uL/well scintillation cocktail (BetaScint; Wallac) was added and plates were counted in a Packard Top-Count for 1 min/well. |
| Affinity data for this assay | |
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