Abstract
Recombinase-mediated cassette exchange, or RMCE, is a genome engineering tool that can be used to swap DNA fragments of interest between two DNA molecules. In a variation of RMCE, called dual RMCE, the exchange of DNA fragments is mediated by two recombinases in contrast to one recombinase in the classic RMCE reaction. Under optimal conditions, the efficiency of dual RMCE can be quite high: up to ~45% of the transfected cells depending on the recombinase pair used to mediate the replacement reaction. Here we describe protocols for preparing for, performing, and optimizing the parameters of dual RMCE.
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