Table 1.
Effect of metal ions and chemical reagents on the enzyme activity of rPcAxe
| Metal ions | Relative activity (%)a | |||
|---|---|---|---|---|
| 1 mM | 2 mM | 5 mM | 10 mM | |
| Na+ | 94.1 ± 1.0 | 98.9 ± 2.1 | 97.9 ± 3.5 | 87.2 ± 4.5 |
| K+ | 91.0 ± 1.1 | 91.0 ± 1.4 | 93.3 ± 0.7 | 88.6 ± 2.1 |
| Ca2+ | 89.9 ± 2.0 | 95.5 ± 1.6 | 96.5 ± 1.5 | 86.7 ± 2.9 |
| Fe3+ | 89.1 ± 1.5 | 89.7 ± 0.7 | 87.9 ± 2.3 | 76.9 ± 1.0 |
| Mg2+ | 89.8 ± 1.6 | 90.9 ± 1.9 | 102.1 ± 1.6 | 93.6 ± 5.9 |
| Al3+ | 92.6 ± 2.1 | 93.7 ± 2.2 | 87.8 ± 5.0 | 82.6 ± 1.6 |
| Zn2+ | 88.4 ± 3.2 | 90.5 ± 1.3 | 91.3 ± 3.5 | 89.7 ± 3.8 |
| Cu2+ | 98.6 ± 1.8 | 97.4 ± 1.7 | 108.8 ± 1.4 | 96.8 ± 2.0 |
| Pb2+ | 94.0 ± 1.3 | 95.4 ± 2.1 | 109.0 ± 4.2 | 102.3 ± 0.8 |
| Mn2+ | 86.4 ± 1.4 | 92.1 ± 3.1 | 95.8 ± 2.0 | 103.3 ± 3.0 |
| Fe2+ | 82.5 ± 4.2 | 93.5 ± 2.2 | 92.7 ± 6.5 | 105.7 ± 2.2 |
| SDS | 85.0 ± 1.7 | 90.6 ± 2.5 | 88.7 ± 1.5 | 72.7 ± 2.3 |
aValues represent the mean ± SD (n = 3) relative to untreated control samples