| FP | fluorescence polarization |
| ER-LBD | estrogen receptor α ligand binding domain |
| IC50 | half maximal inhibitory concentrations |
| LOD | limits of detection |
| CV | coefficients of variation |
| ESP | electrostatic potential |
| GST | glutathione S-transferase |
| CS | coumestrol |
| CR | cross-reactivity |