| SARS | Severe Acute Respiratory Syndrome |
| RBD | Receptor Binding Domain |
| ACE2 | Angiotensin-Converting Enzyme 2 (ACE2) |
| NTD | N-terminal domain |
| RBD | receptor-binding domain |
| CTD1 | C-terminal domain 1 |
| CTD2 | C-terminal domain 2 |
| FP | fusion peptide |
| FPPR | fusion peptide proximal region |
| HR1 | heptad repeat 1 |
| CH | central helix region |
| CD | connector domain |
| HR2 | heptad repeat 2 |
| TM | transmembrane anchor |
| CT | cytoplasmic tail |
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