Table 4.
Effects of metal ions and chemical reagents on the activity of purified rHJ5Nag
| Reagent | Relative activity (%)a | Reagent | Relative activity (%)a | ||
|---|---|---|---|---|---|
| 1.0 mM | 10.0 mM | 1.0 mM | 10.0 mM | ||
| None | 100.0 ± 0.4 | 100.0 ± 2.7 | MnSO4 | 100.9 ± 2.6 | 99.6 ± 2.4 |
| FeCl3 | 117.4 ± 1.8 | 103.1 ± 0.0 | ZnSO4 | 96.8 ± 3.1 | 84.5 ± 9.9 |
| MgSO4 | 113.8 ± 5.8 | 99.3 ± 3.4 | AgNO3 | 0.0 | 0.0 |
| CaCl2 | 108.7 ± 5.4 | 96.6 ± 3.5 | HgCl2 | 0.0 | 0.0 |
| KCl | 105.4 ± 4.8 | 101.4 ± 1.3 | Tween 80 | 131.5 ± 1.7b | 108.1 ± 2.1c |
| CoCl2 | 103.7 ± 3.1 | 100.4 ± 1.7 | EDTA | 106.7 ± 4.5 | 99.5 ± 2.1 |
| NiSO4 | 101.7 ± 8.7 | 95.0 ± 0.7 | β-Mercaptoethanol | 106.1 ± 1.2 | 100.1 ± 0.6 |
| CuSO4 | 101.4 ± 4.8 | 88.6 ± 5.5 | Triton X-100 | 100.5 ± 4.7b | 93.9 ± 5.2c |
| Pb(CH3COO)2 | 101.0 ± 5.8 | 106.7 ± 3.7 | SDS | 0.0 | 0.0 |
aValues represent the means ± SD (n = 3) relative to the untreated control sample
bFinal concentration: 0.5% (w/v)
cFinal concentration: 1.0% (w/v)