Abstract

The optimal reaction conditions for the synthesis of γ-glutamylglutamine using γ-glutamyltranspeptidase from Escherichia coli were determined. The maximum yield of γ-glutamylglutamine (110mM) was obtained using 250mM L: -glutamine and 1.1 U γ-glutamyltranspeptidase/ml at pH 10.5 and at 37°C for 7h; the conversion of glutamine to γ-glutamylglutamine was 88%.

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