EC 3.2.1.8 CAZY Family: GH11 From A. niger. Electrophoretically homogeneous. In 3.2 M ammonium sulphate. Specific activity: 79.3 U/mg (40°C, pH 4.5, wheat flour arabinoxylan as substrate). Contaminants: α-L-arabinofuranosidase, ?-D-xylopyranosidase, and ?-D-mannanase < 0.001%. Stable at 4°C for > 4 years.