?-Amylase (EC 3.2.1.1) is a class of enzymes that is capable of digesting these glycosidic linkages found in starches , catalyzing the cleavage of the ?-1, 4-glucosidic linkages between glucose molecules in starch.With the beginning of new frontiers in biotechnology, the spectrum of ?- amylase application has expanded into many fields, such as clinical, medicinal, and analytical chemistries. ?- Amylase has many applications in the industrial process such as in the food, textiles and paper and Because of the importance of ?-amylase; the current study`s aims are : Isolation and identification of Bacillus stearothermophilus from different soil samples, Production, purification ,characterization of some properties of thermolabile ?-amylase and molecular cloning of ?-amylase gene from Bacillus stearothermophilus in E. coli then investigate the possible expression of ?-amylase gene in the transformed cells. Это и многое другое вы найдете в книге Genetic and Biochemical Study of Alpha-Amylase (Mohammed Al-Askeri,Majed H. Al-Gelawi and Ghazi M. Aziz)