Table I.

WXyn43-specific activity for 1 mM p-nitrophenyl and oligosaccharide substrates

Substrate	Specific activity (U/mg)
p-Nitrophenyl-α-l-arabinofuranoside	0.51 ± 0.01
p-nitrophenyl-α-d-galactopyranoside	n.d.
p-nitrophenyl-β-d-glucopyranoside	n.d.
p-Nitrophenyl-β-d-mannopyranoside	n.d.
p-Nitrophenyl-β-d-xylopyranoside	11.2 ± 0.7
(1 → 4)-β-d-Xylobiose	100 ± 5
(1 → 4)-β-d-Xylotriose	98 ± 4
(1 → 4)-β-d-xylotetraose	29 ± 2
(1 → 5)-α-l-Arabinobiose	n.d.
(1 → 5)-α-l-Arabinotriose	n.d.
(1 → 3)-l-Arabinosyl-β-d-xylobiose	n.d.
(1 → 2)-Arabinosyl-β-d-xylotriose	n.d.

n.d., not detected; U, µmol/min.