Recombination of hybrid target sites by binary combinations of Flp variants: mutations that foster interprotomer collaboration and enlarge substrate tolerance.

Abstract excerpt

Strategies of directed evolution and combinatorial mutagenesis applied to the Flp site-specific recombinase have yielded recombination systems that utilize bi-specific hybrid target sites. A hybrid site is assembled from two half-sites, each harboring a distinct binding specificity. Satisfying the two specificities by a binary combination of Flp variants, while necessary, may not be sufficient to elicit...

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