Assay Method Information

Assay Name:  Receptor Binding Assay
Description:  5-HT2C: A solution containing 50 μL of [H]-mesulergine (GE Healthcare) diluted with 50 mmol/L Tris-HCl (pH=7.4) (the final concentration: about 2 nM), 149 μL of 5-HT2C/CHO cell membrane sample (20 μg/well for the amount of protein), and 1 μL of a solution of a test compound dissolved in DMSO or a solvent (DMSO) was reacted at 37° C. for 30 minutes, and then filtered promptly by aspiration under lower pressure with a glass fiber filter coated with a 1% aqueous solution of bovine serum albumin. The filtered substance on the glass fiber filter was washed with 250 μL of 50 mmol/L Tris-HCl (pH=7.4) twice, and then transferred to an ACS-II (Amersham) 4-mL-glass vial. The radioactivity of the filtered substance remained on the filter was measured by liquid scintillation counter. The radioactivity value measured by liquid scintillation counter was deemed to be a receptor binding activity, and the binding inhibition was calculated from the total binding (TB), non-specific binding (NSB), and specific binding (SB) of a test compound according to the following equations.
Affinity data for this assay
 

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