Production and Purification of a Novel Xanthan Lyase from a Xanthan-Degrading Microbacterium sp. Strain XT11

Table 2

Influence of metal ions on xanthan lyase activity. The assays were performed at 40°C and pH 6.5 and the residual enzyme activity was expressed as the percentage against a control without metal ion addition.

Ions	Control	K^+	Ca^2+	Na^+	Mg^2+	Zn^2+	Cu^2+	Mn^2+	Li^+
Relative activity (%)	100	196.3	194.4	192.1	186.6	53.5	19.0	152.6	191.7