| A1AT | Alpha-1 antitrypsin |
| ACE2 | Angiotensin-converting enzyme 2 |
| CM | Camostat mesylate |
| CatL | Cathepsin L |
| COVID-19 | Coronavirus disease 2019 |
| IMAC | Immobilized metal affinity chromatography |
| k2 | Second order inhibition rate constant |
| NE | No-glycoprotein, no-enveloped pseudoparticle control |
| RCL | Reactive centre loop |
| SARS-CoV-2 | Severe acute respiratory syndrome coronavirus 2 |
| SDM | Site-directed mutagenesis |
| SERPIN | Serine protease inhibitor |
| S | Spike protein |
| Spp | Spike pseudoparticles |
| TMPRSS2 | Transmembrane protease serine 2 |
| WT | Wild type |
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