| ACN | Acetonitrile |
| Cys | Cysteine |
| HRP | Horseradish peroxidase |
| IgA | Immunoglobulin A |
| IgG | Immunoglobulin G |
| ME | Mercaptoethanol |
| PBS | Phosphate-buffered saline |
| PVDF | Polyvinylidene difluoride |
| SDS-PAGE | Polyacrylamide gel electrophoresis |
| TMPRSS2 | Transmembrane protease serin 2 |