TABLE 2.

Effects of metal ions and other chemicals on two AbFs

Metal	Relative activity (%) at indicated metal concn
	XynF on WAX		AbF51 on pNP-AraF
	1 mM	5 mM	1 mM	5 mM
Control	100	100	100	100
Ni2+	111 ± 2.4	95 ± 0.8	82 ± 5.4	85 ± 4.8
Mn2+	105 ± 1.5	110 ± 1.7	98 ± 2.4	117 ± 4.1
Ca2+	99 ± 1.9	114 ± 2.1	96 ± 1.7	106 ± 2.6
Cu2+	28 ± 1.8	18 ± 0.3	0.8 ± 0.2	2.5 ± 0.3
Mg2+	116 ± 1.2	104 ± 2.8	97 ± 1.1	76 ± 2.7
Co2+	125 ± 1.5	113 ± 1.7	78 ± 5.1	39 ± 1.6
Fe2+	53 ± 1.9	30 ± 1.6	16 ± 1.0	37 ± 1.0
K+	96 ± 2.6	91 ± 1.8	14 ± 0.8	17 ± 2.7
SDS	89 ± 0.8	41 ± 1.3	23 ± 0.3	0.2 ± 0.2
EDTA	93 ± 0.9	91 ± 1.1	95 ± 2.1	24 ± 1.9