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.

IonsResidual activity (%)

Ion concentration (mM)
2S5s10

Control100100100
Al3+67 ± 3.090 ± 1099±4
Fe3+43 ± 515 ± 2ND
Cr3+60 ± 583 ± 493 ± 5
Zn2+300
Hg2+000
Mn2+110 ± 293 ± 390 ± 4
Mg2+27 ± 2NDND
Cu2+33 ± 4NDND
Ca2+110 ± 2130 ± 3107 ± 1
Co2+107 ± 3100 ± 593 ± 2
Ag+87 ± 390 ± 193 ± 1
Na+123 ± 3107 ± 298 ± 2
K+63 ± 477 ± 584 ± 3
Ba2+90 ± 190 ± 220 ± 1
Ni2+63 ± 378 ± 281 ± 1
EDTA93 ± 283 ± 383 ± 3

ND: not determined.
Data are mean of three repetitions.