Biotechnological Potential of Agro-Industrial Wastes as a Carbon Source to Thermostable Polygalacturonase Production in Aspergillus niveus

Table 4

Effect of metal ions and EDTA on the activity of the PG produced by A. niveus.

Compound	Relative activity (%)
	1 mM	10 mM
None	100±2.1	100±1.3
Hg^2+	59±2.9	4±1.0
NH4 ^+	87±3.0	87±2.1
Ca^2+	97±2.8	78±2.5
Zn^2+	87±2.6	75±2.2
Ba^2+	101±1.3	39±2.8
Cu^2+	60±1.9	48±2.4
Na^+	95±2.8	93±2.0
Mn^2+	117±1.4	113±3.2
Mg^2+	72±2.9	92±2.9
Al^2+	98±2.3	93±2.1
EDTA	110±3.2	94±3.3