| Hydrogen Bonds | ||||
| Nanobody Nb20 | SARS-CoV-2 | 2*Distance H-A (Å) | ||
| Aminoacid | Residue | Aminoacid | Residue | |
| GLN | 493 | SER | 494 | 3.586 |
| GLN | 493 | ALA | 29 | 2.939 |
| GLN | 493 | ARG | 97 | 3.133 |
| LEU | 492 | ARG | 97 | 3.372 |
| PHE | 490 | ARG | 97 | 3.267 |
| GLU | 484 | TYR | 104 | 2.267 |
| GLU | 484 | ARG | 31 | 3.085 |
| GLU | 484 | ARG | 31 | 2.562 |
| GLU | 484 | ARG | 31 | 3.167 |
| MET | 55 | ARG | 31 | 2.838 |
| MET | 55 | ARG | 31 | 2.676 |