Assay Method Information |
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| Radioligand Binding Assay |
Description: | liquots of membrane preparations were thawed at RT, resuspended in assay buffer (D2, D3: 50 mM Tris-HCl, 120 mM NaCl, 5 mM MgCl2, 1 mM EDTA, 5 mM KC1, 1.5 mM CaCl2, pH=7.4; 5-HT2A: 50 mM Tris-HCl, 10 mM MgCl2, 1 mM EGTA, pH=7.4), homogenized with a Polytron for 20-30 sec at 12.000 rpm and adjusted to a final concentration of approximately 7.5 ug protein / well (D2, D3) and 15 ug protein / well (5-HT2A), respectively.The binding affinity (IQ) of the compounds was determined using radioligand binding. Membranes were incubated in a total volume of 200 ul with a fixed concentration of radioligand (final concentration approximately 0.7 nM [3H] -spiperone for D2, 0.5 nM [3H] -spiperone for D3, and 1.1 nM [3H]-ketanserin for 5-HT2A) and ten concentrations of test compound in ranging between 10uM - 0.1 nM for 1 h at RT. At the end of the incubation, the reaction mixtures were filtered on to unifilter 96-well white microplates with bonded GF/C filters. |
Affinity data for this assay | |
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