Our Flp-In™ Core Kit (part of the Flp-In™ Complete System) contains the necessary vectors to allow Integrate and express your genes of interest at specific genomic locations in mammalian cells. The Flp-In system involves the introduction of Flp recombination target (FRT) sites into the genome of selected mammalian cell lines. The expression vector containing the gene of interest is then integrated into the genome at the FRT site via Flp recombinase-mediated DNA recombination.