| Chemical | Relative activity (%) 1 mM concentration | Relative activity (%) 5 mM concentration |
| Control | 100 | 100 |
| EDTA | 84 | 76 |
| SDS | 150 | 204 |
| Urea | 85 | 40 |
| ZnCl2 | 28 | 44 |
| MgCl2 | 51 | 72 |
| NiCl2 | 47 | 24 |
| CaCl2 | 56 | 80 |
| HgCl2 | 20 | 0 |
| CuCl2 | 96 | 83 |
| Tween20 | 127 | 215 |