Introduction of marker-free deletions in Bacillus subtilis using the AraR repressor and the ara promoter.

Abstract excerpt

We have developed a system for the induction of marker-free mutation of Bacillus subtilis. The system features both the advantages of the use of antibiotic-resistance markers for mutant selection, and the ability to efficiently remove the markers, leaving unmarked mutations in the genome. It utilizes both a selective marker cassette and a counter-selective marker cassette. The selective marker cassette contains a...

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