Characterization of a New Providencia sp. Strain X1 Producing Multiple Xylanases on Wheat Bran

Table 3

Effect of metal ions and solvents on activity of crude xylanase preparation from strain X1.

Additive	Relative xylanase activity (%)
None	100±4.0
Metal
CaCl2	98±4.0
FeSO4	95±4.5
ZnSO4	95±3.2
MgCl2	93±4.1
CuSO4	78±3.0
MnSO4	35±4.4
Solvent
Ethanol	91±4.3
Methanol	82±3.8
Acetone	78±5.0