Table 4.
Enzyme | Specific activitya | Relative activity |
---|---|---|
units/mg | % | |
Wild type | 26 ± 3 | 100 |
E54Q | 0.32 ± 0.23 | 1.2 |
D135N | 0.21 ± 0.01 | 0.81 |
D139N | 0.045 ± 0.043 | 0.17 |
E142Q | 0.024 ± 0.017 | 0.092 |
E211Q | 0.039 ± 0.029 | 0.15 |
D400N | 5.3 ± 0.6 | 20 |
a The errors represent the standard deviation for triplicate measurements.