| AF | Apoplastic Fluid |
| AtXCP1 | Arabidopsis thaliana xylem cysteine protease 1 |
| MAPK | Mitogen activated protein kinase |
| PaCP1 | Phytolacca americana cysteine protease 1 |
| PAP | Pokeweed antiviral protein |
| PLCP | Papain-like cysteine protease |
| RFU | Relative fluorescence units |
| RIP | Ribosome inactivating protein |