Patent attributes
Provided herein are methods of integrating one or more exogenous nucleic acids into one or more selected target sites of a host cell genome. In certain embodiments, the methods comprise contacting the host cell genome with one or more integration polynucleotides comprising an exogenous nucleic acid to be integrated into a genomic target site, a nuclease capable of causing a break at the genomic target site, and a linear nucleic acid capable of homologous recombination with itself or with one or more additional linear nucleic acids contacted with the population of cells, whereupon said homologous recombination results in formation of a circular extrachromosomal nucleic acid comprising a coding sequence for a selectable marker. In some embodiments, the methods further comprise selecting a host cell that expresses the selectable marker.
