Linker mutagenesis in the gene encoding the periplasmic maltose-binding protein of E. coli.

Abstract excerpt

A plasmid carrying the malE gene, coding for the periplasmic maltose-binding protein of E. coli, was submitted to random mutagenesis by the insertion of a BamHI linker. About 25% of the clones recovered had acquired a BamHI site in the gene malE. Most of the linker insertions were accompanied by small deletions with an average size of 30 base pairs. Among 21 mutants synthesizing a stable maltose binding protein,...

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