Description
This product is a kind of high efficiency enzyme obtained from plant by a series of scientific methods. Enzyme system of this product is pure, activity higher, good tolerance to high temperature and no peculiar smell. It is widely used in manufacture of beer, vinegar, high maltose syrup, crystalline maltose syrup etc.

Working mechanism
β- Amylase is a kind of exo-amylase. It begins at the non-reducing end of the liquefaction starch and hydrolyzes them in turn against the maltose unit and react Walden inversion. So the product become to β-maltose from α type. This enzyme can not hydrolyze α-1,6-glucosidic link of starch. Before 1,6 link 2~3glucoase residue stop as starch decomposition. Basically no glucose produced for maltose.

Properties
1. Temperature: It is stable below 65℃, optimum 55-60℃.
2. Effective: pH:3.0-6.5, optimum 5.0-6.0.

Specification
1. Liquid type: Dark brown liquid, 700000u/ml;
2. Unit definition: 1ml（1g）β-amylase under the condition of pH5.5, 60℃. It can produce maltose each hour by hydrolyzing 1.10%, expressed as u/ml (u/g).
3. Standard：LDZJ03.04-2010

Application Guide
The optimum saccharification conditions depend on saccharification time, pH, temperature, substrate concentration and enzyme dosage. So, the application plant should decide the optimum technological conditions according to their conditions, the recommendation usage methods are as

Follow:
1. In the manufacture of maltose syrup and beer brewing, 0.1-0.3L/ton dry basis, the optimum saccharification 13-30hours for maltose syrup the optimum saccharification 0.5-1 hour for beer brewing.
2.In the manufacture of high maltose syrup(>70%), saccharification stage can mix with pullulanase, the recommended method: β-Amylase 0.5-1.0L/ton dry basis, pullulanase 0.5-1.0L/ton dry basis(based on 1000 u/ml), saccharifying for 24hours.
3. In the manufacture of super high maltose syrup(>90%), saccharification stage need to mix with pullulanase and malt trisaccharides enzyme. The recommended methods: β-Amylase 1.5-2.0L/ton dry basis, pullulanase 1.5-2.8L/ton dry basis(based on 1000 u/ml), saccharifying for 24 hours and adding malt trisaccharides enzyme，saccharifying for 24 hours again.