EC 3.2.1.4 From Trichoderma longibrachiatum. Electrophoretically homogeneous. In 3.2 M ammonium sulphate. Specific activity: ca. 53 U/mg (40°C, pH 4.5, CM-cellulose 4M as substrate). Contaminants: endo-1,3-?-glucanase, α-amylase, α-glucosidase and ?-glucosidase < 0.002%; ?-mannanase < 0.1%. Stable at 4°C for > 4 years.