Table 1.

Effects of metal ions and other compounds on xylanase activity

Metal ions	Relative active (%)a
Fe2+	92.08 ± 3.18
Cu2+	96.16 ± 1.38
Zn2+	102.64 ± 2.18
Fe3+	117.05 ± 4.67
Mg2+	97.36 ± 2.67
Mn2+	106.24 ± 3.89
Pb2+	95.82 ± 2.14
Li+	88.72 ± 4.07
Ca2+	93.28 ± 1.19
Ni2+	103.12 ± 2.32
EDTA	105.76 ± 3.21
Control	100 ± 1.86

^aMean of three independent readings, SD within 10 %