The DRUGMATRIX assay measures the radioligand binding of the serotonin 5-HT3 receptor, by using the ligand [3H] GR-65630. This assay is performed in vitro, using HEK293 cells and the membrane subcellular fraction. The assay type used is "Binding," which means that it measures the ability of the ligand to bind to the receptor. Does this assay respond well to the molecule?