| DARPin | Designed Ankyrin Repeat Protein |
| PE | Pseudomonas aeruginosa exotoxin A |
| HER2 | Human Epidermal growth factor Receptor 2 |
| kDa | kilodalton |
| PBS | phosphate-buffered saline |
| IC50 | the half maximal inhibitory concentration |
| ALT | alanine aminotransferase |
| AST | aspartate transaminase |