Additives Relativeactivity(%)at1 mM KRICTP1H1 KRICTPX1 None 100 100 NaCl 100 100 LiCl 100 100 KCl 100 100 NH4Cl 100 100 CaCl2 100 0 MgCl2 100 1 MnCl2 83 3 CsCl2 99 100 CuSO4 21 8 ZnSO4 30 2 FeCl3 79 6 EDTA 54 100 2-ME 100 100 DTT 100 100 PMSF 100 100 Acetate 72 100 Furfural 100 100

Table 2: The improved activity of P1H1 compared to the original KRICT PX1 xylanase effective of additives.