The CompoZr® Targeted Integration Kit-rRosa26 integrates transgenes into the Rosa26 safe harbor locus in the rat genome. CompoZr targeted integration kits employ CompoZr zinc finger nucleases (ZFNs) for precise and heritable gene knock-in, enabling straightforward creation of transgenic cell lines. Kits include the ZFNs and donor plasmid to perform transgene integration by ZFN-assisted homologous recombination.