| Modification | Auxin-Stimulated Activity, µmoles/min/mg protein | |
| NADH Oxidation | DTDP Interchange | |
| None (wild type) | 0.8 ± 0.1 | 0.9 ± 0.05 |
| C44A | 0.15 ± 0.05 | 0.02 ± 0.01 |
| G59A | 0.06 ± 0.02 | 0.07 ± 0.02 |
| E113A | 0.03 ± 0.01 | 0.04 ± 0.02 |
| H106A | 0.04 ± 0.01 | 0.02 ± 0.01 |
| H152A | 0.03 ± 0.01 | 0.02 ± 0.01 |