Abstract
A 4.4 kb EcoRI DNA fragment of the Streptococcus lactis H1 plasmid pDI1 was cloned into the Escherichia coli plasmid pACYC 184. The recombinant plasmid expressed d-tagatose 1,6-bisphosphate aldolase activity in E. coli. Enzyme activity was at the same level as in the original S. lactis host but was not repressed by glucose.
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