The recent state of the knowledge of properties and structure of alpha-amylases is reviewed with the aim of elucidation the basis for their stabilization. Three principal ways for obtaining stable alpha-amylases (isolation of enzymes from extremophiles, production of extremophilic enzymes in mesophiles, and modification of mesophilic enzymes) are discussed separately. Detailed experimental examples are given for modification approaches.

Department of Biochemical Technology Slovak Technical University Bratislava Czech and Slovak Federal Republic

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