Table 3 Effect of various metal ions and EDTA on the activity of recombinant β-mannanase from B. circulans NT 6.7
Metal ions/Chemical | Relative activity (%) | |
|---|---|---|
Extracellular enzyme | Intracellular enzyme | |
Control | 100.00 | 100.00 |
Co+ | 104.74 | 106.32 |
Ca+ | 95.45 | 97.29 |
Zn2+ | 97.50 | 92.24 |
Mn2+ | 95.26 | 95.65 |
Mg2+ | 94.32 | 95.46 |
Li+ | 96.82 | 97.70 |
Cu2+ | 79.05 | 64.08 |
Fe2+ | 40.12 | 39.18 |
EDTA | 32.00 | 37.95 |