| Assay Method Information | |
| | In Vitro Agonist Binding Assay |
| Description: | Preparation of Membrane Fractions from CHO-h5-HT1A Cells. Membranes from CHO cells stably expressing the human 5-HT1A receptor at a density of 8 pmol/mg membrane protein with 5-HT2c receptor background were prepared. Cells were grown in DMEM/F-12 medium supplemented with 5% fatal bovine serum, 50 ig/mL geneticin, and 50 ig/mL hygromycin B in a humidified atmosphere of 5% CO2 until they reached confluence. Cells were harvested by centrifugation (800 g for 5 min) and homogenized using a polytron homogenizer (Polytron, CH-6010 Kreiens-Lu, Brinkman Instrument, Westbury, N.Y.) in buffer containing 20 mM HEPES, pH7.4, 3 mM MgCl2, and a cocktail of protease inhibitors (Sigma-Aldrich, St. Louis, Mo.) at 1:2000 dilution. The homogenate was centrifuged (Beckman Optima LE80K Ultracentrifuge) at 100 000 g for 15 min at 4° C. The pellet was suspended in the same buffer and recentrifuged. The final pellet was suspended in assay buffer containing 20 mM HEPES, pH 7.4, 3 mM MgCl2, 100 mM NaCl, and a mixture of protease inhibitors and stored at -70° C. Protein concentration was determined by detergent compatible colorimetric assay using DC Protein Assay Reagents as recommended by the manufacturer (Bio-Rad, Hercules, Calif.). |
| Affinity data for this assay | |
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