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  • Title: Purification and properties of an endo-1,4-beta-glucanase translated from a Clostridium josui gene in Escherichia coli.
    Author: Fujino T, Sasaki T, Ohmiya K, Shimizu S.
    Journal: Appl Environ Microbiol; 1990 Apr; 56(4):1175-8. PubMed ID: 2187404.
    Abstract:
    An endoglucanase encoded by a gene of Clostridium josui was expressed in Escherichia coli and purified. The homogeneous enzyme, with a molecular weight of 39,000, revealed maximum endoglucanase activity at pH 7.2 to 7.5 and a temperature of 65 to 70 degrees C. The enzyme was stable at a temperature lower than 45 degrees C (the growth temperature of the bacterium) in the range of pH 4.5 to 9.0. The amino acid sequence of the enzyme at the N terminus was Val-Glu-Glu-Asp-Ser-Ser-His-Leu-Ile-Thr-Asn-Gln-Ala-Lys-Lys----. The enzyme hydrolyzed cellotetraose to cellobiose and then transferred cellobiose to the residual cellotetraose. The resulting cellohexaose was cleaved to cellotriose.
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