Table 3.
Summary of ten selected antibodies.
| mAbs | Predicted epitope | Binding EC50 (nM) | KD (nM) | Blocking IC50 (nM) | Pseudovirus neutralization IC50 (ng/mL) | Authentic virus PRNT IC50 (ng/mL) | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| S1 | RBD | S1 | Inhibition max (%) | RBD | Inhibition max (%) | |||||
| 3A9 | RBD-2 | 0.038 | 0.042 | N.D. | 1.74 | 57 | 2.76 | 72 | 93 | 1541 |
| 1F2 | RBD-1 | 0.068 | 0.048 | 39.4 | 4.34 | 92 | 2.65 | 98 | 40 | 25 |
| 1D10 | RBD-1 | 0.115 | 0.054 | N.D. | 13.32 | 85 | 4.91 | 84 | 73 | 85 |
| 1B6 | RBD-1 | 0.047 | 0.043 | 11.3 | 3.88 | 94 | 3.25 | 99 | 12 | 18 |
| 1H8 | RBD-1 | 0.054 | 0.035 | 18.7 | 5.76 | 94 | 3.6 | 96 | 20 | 35 |
| 2B11 | RBD-1 | 0.051 | 0.047 | 4.76 | 2.79 | 95 | 1.96 | 99 | 6 | 1 |
| 1D7 | RBD-1 | 0.092 | 0.055 | 24.2 | 7.8 | 91 | 4.1 | 92 | 30 | 34 |
| 2A2 | RBD-1 | 0.201 | 0.067 | 1070 | N.A. | N.A. | 4.85 | 93 | 705 | 1178 |
| 1E10 | RBD-2 | 0.029 | 0.044 | N.D. | N.A. | N.A. | N.A. | N.A. | 94 | 21 |
| 1B10 | RBD-1 | 0.27 | 0.053 | N.D. | N.A. | N.A. | 7.83 | 90 | 112 | 79 |
KD dissociation constant at equilibrium, N.D. not detectable, N.A. no appreciable.
Epitope were predicted by Epitope binning via bio-layer interferometry. EC50 and IC50 were calculated by fitting to a four-parameter logistic curve with GraphPad Prism Version 8.0.1.