Table 1. Effect of metal cations on the TPS activity.
| Metal | Concentration (mM) | Specific activity (U/mg) | Activity (%) |
|---|---|---|---|
| None | – | 0.163 ± 0.04f,g,h | 100 |
| Mg2+ | 12.5 | 12.797 ± 0.12a | 7,851.20 |
| Co2+ | 12.5 | 3.133 ± 0.05b | 1,922.04 |
| Mn2+ | 12.5 | 0.775 ± 0.11c | 475.71 |
| Ni2+ | 12.5 | 0.657 ± 0.13c | 402.82 |
| K+ | 12.5 | 0.469 ± 0.10c | 287.73 |
| Ag+ | 12.5 | 0.363 ± 0.02d,e | 222.51 |
| Zn2+ | 12.5 | 0.266 ± 0.03e,f | 163.05 |
| Fe2+ | 12.5 | 0.263 ± 0.16e,f | 161.13 |
| Cu2+ | 12.5 | 0.203 ± 0.10f,g | 124.68 |
| Ca2+ | 12.5 | 0.066 ± 0.02g,h | 40.28 |
| Cd2+ | 12.5 | 0.066 ± 0.03g,h | 40.28 |
| Li+ | 12.5 | 0.059 ± 0.01g,h | 36.45 |
| Fe3+ | 12.5 | 0.056 ± 0.03g,h | 34.53 |
| Na+ | 12.5 | 0.034 ± 0.03h | 21.10 |
Note:
All the experiments were performed in triplicate. All the experiments were done three times and the values indicate the mean ± SD. The different superscript letters indicate a significant difference. (P ≤ 0.05 according to Duncan’s multiple range test).