a 1-1 Site-specific recombination occurs at specific DNA sequences in the target DNA CSSR(conserved site-specific recombination) is responsible o for many reactions in which a 8 defined segment of DNa is rearranged◼ CSSR (conserved site-specific recombination) is responsible for many reactions in which a defined segment of DNA is rearranged. Conservative Site -Specific Recombination 1-1 Site-specific recombination occurs at specific DNA sequences in the target DNA