Research Article
Purification of an Exopolygalacturonase from Penicillium viridicatum RFC3 Produced in Submerged Fermentation
Table 2
Effect of metal ions on the exo-PG III activity.
| Ions | Residual activity (%) |
| | Ion concentration (mM) | | 2 | S | 5 | s | 10 | |
| Control | 100 | | 100 | | 100 | | Al3+ | 67 | 3.0 | 90 | 10 | 99 | ±4 | Fe3+ | 43 | 5 | 15 | 2 | ND | | Cr3+ | 60 | 5 | 83 | 4 | 93 | 5 | Zn2+ | 3 | | 0 | | 0 | | Hg2+ | 0 | | 0 | | 0 | | Mn2+ | 110 | 2 | 93 | 3 | 90 | 4 | Mg2+ | 27 | 2 | ND | | ND | | Cu2+ | 33 | 4 | ND | | ND | | Ca2+ | 110 | 2 | 130 | 3 | 107 | 1 | Co2+ | 107 | 3 | 100 | 5 | 93 | 2 | Ag+ | 87 | 3 | 90 | 1 | 93 | 1 | Na+ | 123 | 3 | 107 | 2 | 98 | 2 | K+ | 63 | 4 | 77 | 5 | 84 | 3 | Ba2+ | 90 | 1 | 90 | 2 | 20 | 1 | Ni2+ | 63 | 3 | 78 | 2 | 81 | 1 | EDTA | 93 | 2 | 83 | 3 | 83 | 3 |
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ND: not determined. Data are mean of three repetitions.
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